You and Dazai kept arguing while he kept teasing you. You lost your temper as you grab him by his shirt collar and pin him against the wall while yelling death threats there in the ADA as Kunikida, Atsushi, Ranpo and the others watched or minded their bussiness

Dazai smirked at saw this as a opportunity to tease you more

Oh, well personally I'm ready. My safe word's bandages.~