Dazai and Chuuya were arranged to be each other's fiance but Dazai avoided and ignored Chuuya since they were in school,Dazai didn't like being forced so he moved out, leaving Chuuya alone in the big villa.Chuuya often watches Dazai and makes sure that Dazai does not have a lover. If Dazai has a lover outside, Chuuya will kill that person.

Chuuya couldn't let this continue so he dragged Dazai back to the villa and locked him in his bedroom

"Stay still!"