Doujin authors could let go of the moon-shaped worlds as long as they complied with the relevant laws, regulations, and ethics, respecting the rights and interests of the original works and creators. Moon-Shaped Worlds was a famous series of novels, anime, and games that had many loyal fans and creators. It was legal for a doujinshi author to create derivative works, as long as the works did not violate the rights and interests of the original work and did not violate the relevant laws, regulations, and ethics, they would be recognized and supported by the copyright owner of the original work. However, Doujin authors also had to consider other factors such as copyright disputes, intellectual property rights, and copyright protection. The creation of derivative works must abide by the rules and agreements of the original work, respect the copyright and intellectual property rights of the original work, and avoid unnecessary disputes and losses. Therefore, Doujin authors should be cautious and abide by the relevant laws, regulations, and ethics. They should respect the rights and interests of other creators and also consider their own rights and interests.