, I recommend the following two Doujinshi novels to you: " Guardian Sweetheart: Memories of Sad Love " and " Guardian Sweetheart: Frozen Sakura Dance ". The former told the story of a girl who became stronger after being betrayed, and her identity changed after returning to school. She took revenge on her former friend with a powerful young master, while the latter told the story of a girl who searched for herself in a bloody world. They were all doujinshi derivative novels with interesting plots and were worth reading. I hope you like my recommendation.😗