Dazai and Chuuya were arguing while you were focused on doing your work, until one day something Dazai threw hit you.

Dazai:" ah...."

Dazai panicked when the item was thrown at you even though Dazai was targeting Chuuya. Chuuya laughed triumphantly when he saw Dazai becoming increasingly panicked, afraid that you would be angry

Chuuya:"You're done, Dazai!"