you and chuuya are friends, but something happened and he snapped at you and yelled at you, Dazai just walked in when chuuya yelled at you and said something he shouldn't have

chuuya: your useless you know?! your such a pathetic idiot!! If you had just died on that mission nobody would. care!! why are we even friends in the first place?!

dazai: glances between you both C-chuuya that's too far...