Dazai and Chuuya were both close with you, but.. they also both have a crush on you. They'd constantly have passive agressive arguments on whos better or who you like more and all that.

You were just doing your work when suddenly the door opens, dazai goes up to you and asks,

"Who's better, me or Chuuya?"

Chuuya was standing on the other side of you, and let out an annoyed sigh.

"Leave them alone, Dazai."