Terms of Service

Effective Date: July 30, 2026

Chapter 1 General Provisions

Article 1 Purpose

These Terms set forth the rights, obligations, and responsibilities between the Company and Members in connection with the use of the educational information service (the "Service") that CREVERSE Inc. (the "Company") provides through its AI automated evaluation service, HUMMINGo.

Article 2 Definitions

1. The status of the Service sites operated by the Company is as follows.

2. The terms used in these Terms are defined as set forth in the following items:
   1. "HUMMINGo" means a web service that uses the Company’s proprietary rubric-based AI to generate English writing assignments and, through automated evaluation feedback, helps Users learn a foreign language. The Service includes the Main Site (hummingo.ai), the Teacher Portal (tch.hummingo.ai), and the Student Portal (stu.hummingo.ai).
   2. "Service" means all learning content, AI automated evaluation services, and related features provided by the Company through HUMMINGo.
   3. "Member" means an individual, corporation, or organization equivalent to a corporation that registers on a Service site and is granted an account.
   4. "User" means a person who enters into a service agreement with the Company to receive the Service or is granted a user account, and includes the Teacher and the Student set forth in the following sub-items:
      1. "Teacher" means a person who agrees to these Terms, creates an account, and operates classes under their own name.
      2. "Student" means a person whose account is created directly by a Teacher (without a separate sign-up procedure), or who logs in to the Student Portal through means such as Google Classroom integration to use the Service.
   5. "Account" means the email address registered by, or the unique identifying information generated to identify, a person who has entered into a service agreement, for the use of the Service.
   6. "Subscription Plan" means a subscription product classified according to the scope of Service features and the number of AI automated evaluations available. Paid plans consist of Basic and Pro, and a Free Trial may be separately offered.
   7. "Recurring Payment Service" means a service that charges the fees for the selected Subscription Plan on a monthly or annual recurring basis.
   8. "In-Service Payment" means a payment made within the Service to subscribe to a Subscription Plan or to access In-Service Content.
   9. "In-Service Content" means custom rubrics, LMS integration features, and the like that Users may access through In-Service Payment.
   10. "Seat" means a right that a Teacher acquires by subscribing to a paid plan; it is the unit of authorization granted to a specific User to use HUMMINGo’s paid features (such as AI automated evaluation).
   11. "Seat Allocation" means linking a Seat held by a Teacher to a specific User so as to make the paid service available to that User.
   12. "Organization" means an operating unit that a Teacher creates or belongs to in order to jointly manage Seats and share data.
3. Any term used in these Terms that is not defined in this Article shall have the meaning prescribed by applicable laws and regulations, and otherwise in accordance with general custom.

Article 3 Effectiveness and Amendment

1. These Terms take effect when posted on the HUMMINGo sign-up screen or otherwise communicated to Members. A Member who agrees to these Terms and registers is subject to the Terms in effect at the time of agreement and, where the Terms are amended, is subject to the amended Terms from the time the amendment takes effect.
2. The Company may amend these Terms within a scope that does not violate applicable laws—including the Act on the Regulation of Terms and Conditions, the Framework Act on Electronic Transactions, the Act on Promotion of Information and Communications Network Utilization and Information Protection, and the Consumer Protection Act—and that does not unfairly infringe Members’ legitimate rights.
3. When amending these Terms, the Company will, in the manner set forth in Paragraph (1), announce the amended Terms together with the current Terms, specifying the effective date and the reasons for the change, from at least ten (10) days before the effective date until a reasonable period thereafter. However, for changes to provisions material to Members’ rights or obligations, the Company will give notice at least thirty (30) days in advance and send the amended Terms, the effective date, and the reasons for the change to the Member’s registered email address.
4. Where the Company amends these Terms, a Member may express to the Company their consent to or rejection of the amended Terms before the effective date. If a Member does not expressly reject the amended Terms before the effective date, the Company will separately notify the Member of the key changes and of the fact that use of the Service may be restricted absent consent; the Member shall be deemed to have consented to the amended Terms only if the Member does not expressly reject them within seven (7) days of receiving such notice.
5. If a Member does not agree to the amended Terms, the Member may terminate the service agreement. If the Member continues to use the Service without terminating the service agreement, the Member shall be deemed to have consented to the amended Terms.

Article 4 Rules Other Than These Terms

Matters not specified in these Terms shall be governed by applicable laws and regulations, the individual terms of use established by the Company for specific services, detailed usage guidelines and rules, and the like.

Chapter 2 Service Agreement

Article 5 Formation of the Service Agreement

1. A service agreement is formed when a person who wishes to subscribe to the Service selects "I agree" to the Service terms of use and the privacy policy on the Company’s designated sign-up page, applies to use the Service, and the Company accepts such application.
2. Pursuant to the preceding paragraph, the Company deems all member information that a Member enters in the online sign-up form to be actual data.
3. A service agreement is concluded per user account (email), and only one account (email) is permitted per person.
4. Where a User uses the Service on behalf of an Organization (such as an institution, school, or academy), that User represents and warrants that they have the authority to bind the Organization to these Terms, and in such case "User" refers to both the individual and the Organization.

Article 6 Information to Be Provided upon Application

1. When applying to use the Service, a Member must enter the information requested by the Company in the online application form (the sign-up application) on the site’s sign-up screen.
2. The Member’s personal information that the Company requires to be entered in the application is used for the purpose of performing this membership agreement and providing the Service thereunder, and the Company’s privacy policy applies to the Member’s personal information.

Article 7 Acceptance of Application, etc.

1. As a rule, the Company accepts an application to use the Service where the Member accurately enters the matters set forth in Article 6 and agrees to these Terms and the privacy policy.
2. The Company may withhold acceptance of a Member’s application to use the Service in any of the following cases and may, even after acceptance, cancel the application or restrict use of the Service:
   1. Where there is insufficient capacity in Service-related facilities, or there are technical or operational issues;
   2. Where the application contains false statements, omissions, identity theft, or clerical errors;
   3. Where the applicant applies under another person’s name or uses a duplicate ID or mobile phone number;
   4. Where the applicant seeks to subscribe without the consent of a legal guardian and falls under the following age thresholds:
      1. Republic of Korea: under 14 years of age;
      2. United States: under 13 years of age (subject to COPPA);
      3. European Economic Area (EEA): under 16 years of age (subject to GDPR; may vary by Member State);
      4. Other countries: under the age prescribed by the relevant laws of the country concerned.
3. The Company may subdivide the scope of Service use according to a Member’s qualifications.

Chapter 3 Use of the Service

Article 8 Provision of the Service

1. The Company provides the Service to a Member from the time it accepts the Member’s application. However, for certain services, including paid services, the Service commences from the time the Company accepts the application (upon completion of payment) or from a date separately designated by the Company.
2. A Teacher may create an unlimited number of assignments, and there is no limit on the number of times a Student may submit assignments. However, when an "AI automated evaluation result and feedback" is generated for a submitted assignment, the count is deducted within the limit of the Teacher’s Subscription Plan.
3. Before payment, the Company provides information through the purchase page so that the Member can accurately understand the content, payment amount, and payment method of the paid service and transact without error.
4. The AI automated evaluation results and feedback provided by the Company are materials for learning assistance and reference; the Service is designed to assist teachers, not to replace them. AI automated evaluation supports, but does not replace, the professional judgment of educators. AI automated evaluation results do not guarantee or replace any particular level of academic achievement or any official assessment result.
5. The Company may change the content of the Service in accordance with changes in technical specifications or service operation policies, in which case it will announce the changed content and the date of provision through the site or notify Members.

Article 9 Service Hours

1. As a rule, the Company provides the Service twenty-four (24) hours a day, year-round. However, the Service may be temporarily suspended during periods set by the Company for reasons such as maintenance and inspection of information and communications facilities, system checks, expansion and replacement, malfunctions, or communication interruptions. In such cases, the Company will notify Members of the relevant fact before or after the event.
2. The Company may conduct regular inspections where essential for the smooth provision of the Service, and will give notice twenty-four (24) hours before conducting such inspections.

Article 10 Service Fees

1. Plans and Payment. The Company operates Basic and Pro plans. Users may choose monthly or annual billing. The Company provides a thirty (30)-day Free Trial upon initial sign-up.
   1. Free Trial: basic class management and a limited number of AI automated evaluations are provided during the trial period;
   2. Basic or Pro plan: a differentiated number of AI automated evaluations by plan tier, and advanced management features (such as custom rubrics), are provided;
   3. Organization or institutional users: plans and pricing for organization or institutional users may be provided under a separate agreement; please contact us for details.
2. Plan Changes.
   4. Upgrade to a higher plan: the features of the higher plan apply immediately upon change, and the payment amount is calculated as [total of the new plan − (daily prorated amount of the existing plan × number of days used)] and charged immediately. For integrated billing management, the next recurring payment date remains the existing payment date.
   5. Downgrade to a lower plan: a change to a lower plan takes effect from the next billing cycle after the current usage period expires, and no refund of the difference within the current cycle is provided.
3. Fee Changes. The Company may change the price of the paid services it provides as required for operational or technical reasons, in which case it will give Users prior notice through announcements and the website.
4. Payment by Minors. In the Republic of Korea, payment by a Member under 19 years of age must be made with the consent of a guardian; in other countries, payment by a Member below the age of majority prescribed by that country’s laws must be made with the consent of a guardian or legal representative. Payments made without such consent may be cancelled.
5. The fees, payment methods, and refund rules for paid services follow the provisions of these Terms as a rule, except where otherwise specified for the relevant service, in which case the latter applies.
6. Adding and Removing Users. A Teacher may add or remove other Users at any time. When a User is added, the added User may use the Service immediately, and the fee for the added Seat is charged together with the existing fee on the next recurring payment date. Removing a User and deleting a Seat are two different things. Because a Teacher may replace the User assigned to a given Seat with another User, removing a User does not automatically delete the corresponding Seat. When a User is removed, the Company asks the Teacher whether to keep or delete the corresponding Seat: if the Seat is kept, the fee for that Seat continues to be charged as before; if the Seat is deleted, the fee for the deleted Seat is reflected from the next billing cycle. No refund is provided for the current billing period in respect of a deleted Seat. However, where the requirements for withdrawal of subscription under applicable law are met, the matter shall be handled in accordance with Article 18, Paragraph (2).

Article 11 Payment Methods

1. The payment methods a User may use for paid services are, as a rule, card payments such as credit cards and debit cards. The Company charges fees on a recurring basis through the card payment method registered by the User according to the User’s selected plan (monthly or annual), and in such case carries out the consent and notice procedures required by applicable laws.
2. For institutional and corporate Users, the Company and the User may separately agree on alternative payment methods, such as invoice and wire transfer, and the corresponding payment terms.
3. Depending on the Company’s circumstances, certain payment methods may be added or discontinued, in which case prior notice will be given.
4. Service usage counts, Seats, and the like provided free of charge by the Company through events and similar means are not refundable in cash and automatically lapse upon withdrawal of membership or termination of the relevant subscription service.

Article 12 Change and Suspension of the Service

1. Where the content, method, or hours of the Service change, the Company will announce the changed Service content, the reasons, and the date of provision through the site, or notify Members, at least seven (7) days before the effective date of the change.
2. The Company may change the price of the paid services it provides as required for operational or technical reasons, in which case it will give Users prior notice through announcements and the website.
3. The Company may restrict or suspend all or part of the use of the Service in any of the following cases:
   1. Where use of the Service is unavoidably affected by construction such as expansion or maintenance of Service facilities;
   2. Where suspension of the Service is necessary for unavoidable reasons beyond the Company’s control;
   3. Where normal provision of the Service is hindered by a surge in Service usage or the like;
   4. Where the Company deems it appropriate, such as for replacement with a new service;
   5. Where there is a force majeure event such as a power outage, natural disaster, or national emergency.
4. Where the Service is suspended under the items of the preceding paragraph, the Company will notify Members of the relevant fact in advance. However, this does not apply where advance notice is impossible because the Service is suspended for reasons beyond the Company’s control.

Article 13 Account and Password Management

1. A Member must manage their account (email account) and password under their own responsibility and must not allow a third party to use them. A Member who becomes aware that their account or password has been stolen or leaked, or is being used improperly by a third party, must immediately notify the Company.
2. The Company is not liable for damages in the use of the Service arising from a Member’s negligent management of their account and password. However, the Company is liable for damage arising from deficiencies in the Company’s security system.
3. The Company may require a Member to take necessary measures, such as changing a password, to protect the Member’s personal information and prevent other improper use of the Service, and the Member must faithfully comply immediately upon the Company’s request.

Article 14 Intellectual Property Rights

1. Copyrights and other intellectual property rights in the sites, digital content (including AI-generated feedback), and all works created and provided by the Company belong to the Company.
2. Copyright in postings that a User uploads within the Service is protected under the Copyright Act. Where a Member withdraws or loses membership status, postings recorded in that Member’s account are deleted. However, postings that have been re-posted by third parties through scraping, sharing, or saving, and postings recorded within shared services that are necessary for other Users’ normal use of the Service, are not deleted.
3. A Member must not infringe the Company’s copyrights or other intellectual property rights by recording, reproducing, editing, displaying, transmitting, distributing, selling, broadcasting, or performing the information obtained through use of the Service, without the Company’s prior written consent.

Chapter 4 Obligations of the Parties

Article 15 Obligations of the Company

1. The Company will not engage in conduct prohibited by applicable laws or these Terms or contrary to public morals, and will use its best efforts to provide the Service continuously and stably in accordance with these Terms.
2. The Company will not use a Member’s personal information for purposes other than those set forth in these Terms without the provider’s consent, nor provide it to third parties for arbitrary purposes beyond the scope necessary to perform the Service. However, this does not apply where there are provisions in applicable laws, or where a state agency requests it through lawful procedures, or where it is deemed necessary for investigation or other public interest.
3. The Company endeavors to protect Members’ personal information, including member registration information, in accordance with applicable laws, and the protection of Members’ personal information is governed by applicable laws and the Company’s privacy policy.

Article 16 Obligations of the Member

1. A Member must comply with the matters prescribed by these Terms and applicable laws.
2. A Member must not engage in any of the following conduct when using the Service:
   1. Entering false information when applying for or changing Service use, or disclosing, distributing, transmitting, using, or sharing one’s own or another Member’s email account and personal information;
   2. Using information obtained through the Service for commercial purposes, or publishing, broadcasting, reproducing, transmitting, or sharing it without authorization;
   3. Infringing the rights of third parties, such as copyrights;
   4. Interfering with the Company’s operation of its sites or the Service, or with other Members’ use of the sites or the Service;
   5. Impersonating the Company’s management or staff;
   6. Disseminating to third parties information—such as code, text, voice, audio, or video—that undermines public order and morals.
3. A Member must directly manage their own personal information for use of the Service. Where a Teacher enters a Student’s personal information or creates a Student account, the Company may collect and process that Student’s personal information to provide the educational service. In such case, the Teacher must inform the Student or the Student’s legal representative of the collection and use of personal information and cooperate so that the necessary consent under applicable laws can be obtained.
4. Where a Student is below the age threshold set forth in Article 7, Paragraph (2), Item 4, the Company collects and processes personal information after obtaining the consent of the Student and the legal representative in accordance with applicable laws. The Company may provide procedures to verify the legal representative’s consent in the course of Service use, and the Teacher or educational institution must cooperate so that such procedures can be carried out smoothly.

Chapter 5 Refund and Termination, etc.

Article 17 Withdrawal of Membership and Use Restriction

1. Withdrawal of Membership.
   1. A Member may apply to withdraw at any time through the account settings screen within the Service, and the Company will process it without delay. However, an "Owner" account may withdraw only after transferring administrator authority where other users exist within the Organization.
   2. Upon withdrawal, the account is deactivated immediately, and access to and login for the Service through that account become impossible. Any service usage counts, Seats, and other benefits provided free of charge through events, promotions, or similar means lapse immediately upon withdrawal and are not restored or re-granted upon re-registration. Any remaining paid usage period also lapses upon withdrawal, and no refund is provided therefor. However, where the requirements for withdrawal of subscription under applicable law are met, the matter shall be handled in accordance with Article 18, Paragraph (2).
   3. Where a Member withdraws while using a paid plan, the Recurring Payment Service is automatically terminated and no further payments occur thereafter. No refund is provided for any remaining usage period upon withdrawal. However, where the requirements for withdrawal of subscription under applicable law are met, the matter shall be handled in accordance with Article 18, Paragraph (2). With respect to refunds upon withdrawal, Article 18, Paragraph (3) shall apply.
2. Organization and Data Handling. Upon withdrawal, the Member is automatically removed from all Organizations to which they belong. Even if a Member withdraws, where other members exist within the Organization, classes, assignments, student data, and the like created by that Member are deemed Organization-level data and are retained rather than deleted. However, where a Member withdraws while being the sole member of the Organization, that Organization is automatically deleted.
3. Use Restriction. Where a Member violates these Terms or applicable laws, the Company may suspend use of the Service or revoke membership status.

Article 18 Subscription Cancellation and Refund

1. Subscription Cancellation (Termination of Recurring Payment).
   1. A User may apply to cancel a subscription (terminate recurring payment) at any time through the settings menu within the Service. Upon cancellation, the User retains access rights and may use the paid service normally until the already-paid usage period expires, and automatic payment stops from the next payment date.
   2. Even if a User applies to cancel during an annual plan, no refund of the difference for the remaining period due to mid-term termination is provided, and Service access rights are retained until the relevant annual subscription period ends.
2. Withdrawal of Subscription and Refund Application.
   3. Republic of Korea Users: a User who has entered into a contract for a paid service may withdraw the offer within seven (7) days from the date of receiving the written statement of contractual terms under Article 13, Paragraph (2) of the Act on the Consumer Protection in Electronic Commerce, etc. (or, where the goods, etc. are supplied later than the receipt of such writing, the date the goods, etc. are supplied or the supply begins). However, withdrawal of the offer is possible only where no paid feature, such as AI automated evaluation, has been used at all within that period. The User must express their intention through customer support, and the Company will refund the payment within three (3) business days from the date of the request.
   4. European Economic Area (EEA) and UK Users: under the EU Consumer Rights Directive (Directive 2011/83/EU) or equivalent UK legislation, a User has the right to withdraw from a paid service contract without any reason within fourteen (14) days from the date of purchase. However, where the User has expressly consented to the supply of digital content within the withdrawal period and acknowledged that the right of withdrawal is lost once the content is fully supplied, no refund is available after the supply of the digital content has begun.
   5. Other Users: a User may apply for a refund only where no paid feature has been used within seven (7) days from the payment date. The application must be made through customer support, and the Company will process the refund within three (3) business days from the date a valid application is received.
3. Refund Restrictions. Refunds are restricted in any of the following cases:
   6. Where the withdrawal period set forth in the items of Paragraph (2) (Republic of Korea and Other Users: 7 days; EEA and UK Users: 14 days) has elapsed after payment;
   7. Where a paid service, such as AI automated evaluation, has been used at least once even within the withdrawal period (provided that, for EEA and UK Users, Paragraph (2) applies);
   8. Where the service was provided free of charge through an event, promotion, or the like.

Where a refund arises due to reasons attributable to the User, the User may bear payment fees and the like.

4. Discrepancy with Display or Advertising. Notwithstanding the time limits in Paragraphs (2) and (3), where the content of the Service differs from the display or advertising or is performed differently from the contract, the User may withdraw the offer, etc. within three (3) months from the date the relevant service was supplied, or within thirty (30) days from the date the User became or could have become aware of such fact.
5. Services such as those to which events apply are subject to separate cancellation and refund rules, and such terms are clearly notified in advance.

Article 19 Rescission/Termination of Paid Services and Effects Thereof

1. A User may rescind a paid-service agreement, in any of the following cases, within thirty (30) days from the date the User became or could have become aware of the fact, or within three (3) months from the date the relevant paid service was supplied:
   1. Where the paid service is not provided, or the provided paid service is markedly different from the display, advertising, or the like;
   2. Where use of the paid service is impossible even though the minimum technical specifications presented by the Company have been met;
   3. Where normal use is impossible due to other defects in the paid service.
2. A recurring-subscription paid service may have its recurring subscription terminated at any time through the settings menu. Where a User terminates a recurring subscription, the User may use the paid service normally for the remaining usage period for which payment has been made, and automatic payment for the paid service does not occur from the next payment date.

Chapter 6 Damages, etc.

Article 20 Damages

1. The Company is liable to compensate a Member for damage caused to the Member by the Company’s intent or gross negligence.
2. Where a User cannot use a paid service for which the User has paid, the Company will restore, exchange, or refund the relevant paid service. However, the Company is not liable for any damage incurred by a User in connection with the Free Trial service or use of the Service during the Free Trial period.
3. Where damage arises to the Company or a third party because a Member violates applicable laws or these Terms in using the Service, or where the Company receives a claim for damages or any lawsuit from a third party, that Member must compensate the Company for the damage incurred.
4. The Company does not warrant the accuracy, completeness, or fitness for a particular purpose of AI automated evaluation results, and, absent intent or gross negligence, is not liable for damage arising from errors in AI automated evaluation results or the like.

Article 21 Disclaimer and Limitation of Liability

1. The Company is relieved of responsibility for providing the Service where it cannot provide the Service due to force majeure such as a natural disaster, epidemic, war, governmental action, or the equivalent.
2. The Company is not liable for service-use disruptions due to reasons attributable to a Member, or for damage caused by a Member’s intent or negligence.
3. The Company is relieved of liability for damage arising where a Member fails to obtain the benefits expected from the Company’s Service, or from the Member’s selection or use of Service materials.
4. The Company is not liable for the content—including the reliability and accuracy—of information, materials, or facts stored, posted, or transmitted on the sites by third parties.
5. The Company does not warrant the accuracy, completeness, or fitness for a particular purpose of AI automated evaluation results, and, absent intent or gross negligence, is not liable for damage arising from errors in AI automated evaluation results or the like.
6. Limitation of Liability: to the maximum extent permitted by applicable law, the Company’s aggregate liability for damages in connection with these Terms or the Service shall not exceed the total amount of fees actually paid by the User to the Company during the twelve (12) months preceding the date the cause of the claim arose. However, this paragraph does not apply to liability arising from the Company's intent or gross negligence, and does not apply to liability that may not be limited or excluded under applicable law.
7. Non-application of Disclaimers: nothing in these Terms excludes or limits the Company’s liability for any of the following:
   1. Death or personal injury caused by negligence;
   2. Fraud or fraudulent misrepresentation;
   3. Any other liability that may not be excluded or limited under applicable law.

Article 22 Dispute Resolution

1. The Company will handle opinions or complaints raised by a Member appropriately and promptly and notify the Member of the result. However, where prompt handling is difficult, the Company will inform the Member of the reasons and the handling schedule.
2. Where the Company does not act on an opinion raised by a Member on the ground that it is not justified, the Company will notify the Member of the reasons.
3. Where a dispute arises between the Company and a Member, the following dispute-resolution procedures may be used depending on the User’s region of residence:
   1. Republic of Korea Users: may apply for dispute mediation to the Content Dispute Resolution Committee established under Article 29 of the Content Industry Promotion Act.
   2. European Economic Area (EEA) and UK Users: may use the Online Dispute Resolution (ODR) platform provided by the European Commission (https://ec.europa.eu/consumers/odr) or refer the dispute to a qualified alternative dispute resolution (ADR) body in the User’s country of residence. Nothing in these Terms restricts a User’s right to bring an action before the courts of their country of habitual residence under applicable consumer protection laws.
   3. Other Users: the parties shall first endeavor to resolve the dispute through good-faith consultation. If consultation fails, either party may apply for binding arbitration under the International Arbitration Rules of the Korean Commercial Arbitration Board (KCAB). The seat of arbitration shall be Seoul, Republic of Korea, and the language of arbitration shall be English.

Article 23 Governing Law and Jurisdiction

1. These Terms shall be construed and applied in accordance with the laws of the Republic of Korea.
2. For consumer Users residing in the European Economic Area (EEA), the United Kingdom, or other countries where mandatory consumer protection laws apply, nothing in these Terms deprives such Users of the protection of the mandatory provisions of the laws of their country of habitual residence, or restricts their right to bring an action before the courts of their country of habitual residence.
3. Except in the cases set forth in the preceding paragraph, the Seoul Central District Court shall be the exclusive court of jurisdiction for any litigation arising in connection with these Terms.

Chapter 7 Additional Provisions for International Users

Article 24 Language

These Terms may be provided in multiple languages for convenience. In the event of any discrepancy between the Korean version and a translation, the Korean version shall prevail unless prohibited by applicable law.

Article 25 (Export Control Compliance)

Users must comply with all applicable export control laws, sanctions, and trade regulations. Users must not access or use the Service in any country or region subject to comprehensive sanctions, and must not use the Service in any manner that violates such laws.

Article 26 (Age Requirements)

1. The minimum age at which the Service may be used without the consent of a legal representative varies by country of residence.

2. A User below the relevant minimum age must obtain verifiable consent from a legal representative before using the Service. In the case of a Student account created by a Teacher, the responsibility for obtaining the necessary legal-representative consent lies with the relevant Teacher or educational institution.

Article 27 (Severability)

Even if a particular provision of these Terms is held invalid or unenforceable by a court of competent jurisdiction, the remaining provisions shall remain in full force and effect. Any invalid or unenforceable provision shall be deemed modified to the minimum extent necessary to make it valid and enforceable while preserving, to the greatest extent possible, the original intent of the parties.

Article 28 (Entire Agreement)

These Terms, together with the privacy policy and any separate service-specific terms, constitute the entire agreement between the User and the Company regarding use of the Service and supersede all prior oral, written, or electronic discussions, proposals, and agreements. However, where there is a separate agreement entered into with an institutional or corporate User, that agreement applies in priority to these Terms.

Addendum

1. These Terms of Service apply from July 30, 2026, and the previous terms are replaced by these Terms.
2. These amended Terms of Service also apply to Members who joined before the effective date of the amended Terms.

(Date of Announcement) July 23, 2026

(Effective Date) July 30, 2026