fan fiction
Doujinshi referred to novels based on the same characters, the same theme, or the same story background created by different people. This type of novel is often called "doujinshi" or "derivative novel", in which the characters and storyline are different from the original but the theme and background are usually the same. There were many ways to create doujinshi novels. Some were based on the original world view and character settings, while others rearranged the original plot and added their own creativity. Doujin novels were often loved by the fans of the original works and were one of the main sources of income for many Doujin creators. Doujinshi novels had a wide variety of styles, including Wuxia, Fantasy, Science Fictions, Horror, and Romance. Some of the famous Doujinshi novels included The Master, Harry Potter, and League of Legends.