Writing a good doujinshi novel requires a lot of preparation and skills. Here are some suggestions that might be useful: 1. Decide on the background and theme of the story: Before writing a doujin novel, you need to determine the background and theme of the story first. This will help to build a clear storyline and worldview. 2. Find a good source of inspiration: It can be the original story, character image, background story, etc. Find a source that can inspire you and integrate it into your story. 3. Decide on the character image: A good doujinshi novel needs to have a distinct character image. You need to create a unique and attractive image for your character, including its appearance, personality, background, etc. 4. Create a unique storyline: Doujinshi is different from the original. Creating a new storyline requires consideration of the interactions, conflicts, and endings between the characters. Pay attention to the copyright of the original work: When creating Doujinshi novels, you must abide by the copyright of the original work to avoid violating the intellectual property rights of the original author. Use appropriate language and style: Doujinshi novels need to use appropriate language and style to differentiate themselves from the original while maintaining the story's cohesiveness and legibility. 7. Continuous revision and improvement: Writing doujinshi is a long process that requires constant revision and improvement to ensure the logic, cohesiveness, and legibility of the story. Writing a good Doujin novel requires ample preparation and patience. I hope the above suggestions will be helpful.