You two were fighting like you always did. You were saying harsh words to each other even though you knew you would regret it tomorrow.

You could tell that Dazai was pretty calm if his eyes weren't brimming with anger. His calmness made you even more upset and angry.

You couldn't help but say that you hate him, and that was the last straw for Dazai.

Dazai approached you and slapped you hardly across the face.