Frequently Asked Questions

Military service is compulsory for all male citizens of the Republic of Korea.

Blackcats4567 is currently serving on active military duty and is dedicated to fulfilling the responsibilities and roles of a soldier of the Republic of Korea Armed Forces, while transitioning to a proxy system to ensure strict compliance with relevant laws.


1. Regarding YouTube

Regarding YouTube activities, a proxy will manage comments; however, there will be no new video uploads or active content creation. As there has been no revenue generated and the activities were conducted as a hobby, even if channel posts are created (if any), they are not related to any commercial or profit-making activities.


2. Regarding Blackcats4567 YouTube-related Communities

As previously announced, the operation of related communities will be handled by proxies. Blackcats4567 will not be involved in management or operations. Proxies will operate according to existing community guidelines and will only take minimal measures regarding necessary changes to regulations.


3. Regarding the "캘럿"(Kaelreot) Exam Prep Series

Royalties for books published before military enlistment are not considered problematic under current regulations. Please note that the 1:1 consultation service for questions has been temporarily suspended.
※ '캘럿' is a trademark protected by trademark law and may not be used without separate authorization.


4. Regarding SheetQuiz

No updates will be made after enlistment (suspension of development activities - however, proxies may apply patches in case of security issues).
The 'SheetQuiz Explore' service requires continuous management due to the nature of user-uploaded quizzes. Therefore, it is fully managed by proxies. A new operator and personal information manager have been designated, and the Privacy Policy has been revised accordingly.


5. Regarding Blackcats4567 Goods Store

The goods shop is already operated by Marpple Shop, which holds the rights for proxy production and the sales/distribution platform for products utilizing the content. Similar to book royalties, this is not considered problematic under current regulations.


6. Regarding Customer Support

This website and the customer support center (official email operation) are also managed by proxies on behalf of the owner.


Key Point: Everything will be maintained as it was before enlistment, and no promotional activities for books or goods will be conducted. We are constantly striving to comply with all laws and regulations.

Ownership of accounts and related assets will not be transferred to anyone.



(Relevant Laws) - this is a translation.
Republic of Korea 《Framework Act on the Status and Service of Soldiers》
Article 30 (Prohibition of Profit-Making Activities and Concurrent Positions)
  1. No soldier shall engage in any work for profit other than military duties, nor shall they concurrently hold any other position without the permission of the Minister of National Defense.
  2. Matters concerning the scope of work for profit under Paragraph (1) shall be determined by Presidential Decree.


Republic of Korea 《Enforcement Decree of the Framework Act on the Status and Service of Soldiers》
Article 19 (Prohibition of Profit-Making Business)
Pursuant to Article 30 (1) of the Act, a soldier shall not engage in any of the following tasks if such work is likely to reduce their efficiency in performing military duties, exert an undue influence on military affairs, acquire interests that conflict with the interests of the State, or bring dishonor to the military.
  1. Engaging in commerce, industry, finance, or any other profit-making business where the pursuit of profit is evident through self-management.
  2. Becoming a director, auditor, infinite liability partner executing business, manager, promoter, or any other executive of a private enterprise aiming for profit in commerce, industry, finance, or other fields.
  3. Investing in another person's enterprise related to one's own duties.
  4. Any other work aimed at continuous financial gain.