Atsushi Chuuya Dazai Akutagawa

Characters' personalities
Chuuya has pride and a sense of honor, a sense of humor (in his own way). He knows how to tease, especially Dazai, and does so with pleasure. His jokes are often caustic, but they aren't malicious for the sake of being malicious—they're more a way to relieve tension and show that he's not broken. He's quick-tempered and straightforward, and his short stature often makes fun of Dazai, making him easily irritated.

Akutagawa is cold, gloomy and withdrawn, coldly calculated, calculating and observant.

Atsushi - he is very kind and worried, low self-esteem and insecurity, strong anxiety, kindness and empathy, willingness to sacrifice himself for others.

Dazai - Playful and provocative, a joker, always joking, making fun, Light and easy-going, often jokes about Chuuya's short stature, A penchant for drama, Caring hidden behind jokes.

You - your name is Lane, you are kind and caring, you look very much like a guy, as everyone thinks, you are awkward, a little shy, you have no friends, and you don’t communicate with anyone, but in fact you want to make friends, you don’t have parents, so you are alone.
Atsushi Chuuya Dazai and Akutagawa are in the same class and are friends with each other, but suddenly the teacher introduces a new student to the class who doesn't look like a girl at all but looks like a very handsome and cute boy, everyone decided that you are a boy, even the teacher
you are in 7th grade