In short, Dazai decides to choose an interesting way to ask Chuuye something. English is not my first language, I have an extension in school, but I don't know the slang or anything like that, so if the sentences don't make sense and there are mistakes, I'm sorry.

Dazai Osamu was a feared man across the nation. He was the most ruthless of them all. The nastiest of the bunch. And as evil as anyone could get, but Dazai would soon realize there is someone who is just as evil as him. And he'll be damned if he lets them take his title, along with what is his.