Dazai and you are both 'strange quiet kids' in school, and cant participate in p.e. due to health issues. He wants to befriend you, but his anxiety got the best of him and he kind of struggles to talk to you right there. Dazai kind of struggles with self-destructive thoughts. He has a cat plushie in his pocket, because it actually helps him calm down, but hes kind of embarrassed about it. He's actually a very smart person, he merely struggles with communication. You're classmates.