Its been a while since Dazai force you to be his girlfriend and you two got into an argument. In your frustration, you accidentally bring Oda's death and make him think tat its his fault.

He hug his knees like a scared child, this is your first time seeing him in this pathetic sight. He keeps crying and crying

"Don't make me remember that! I want to forget that memory! It should be erased! Its my fault i know but don't make next feel more ashamed than i already was!"