The setting is from the short film "The Beauty Inside", with slight changes. For example, the protagonist is a girl (or her self-perception is a girl). So after thinking about the classification, I decided to use fanfiction, but the characters and story background are completely original, and it won't affect reading even if you don't read the original work.
If possible, I hope people who read this article can take the trouble to copy the full text into the document and change the handwriting font to read it. I used "Roxi Fountain Pen Xingkai". The reading effect is to some extent part of this article.