Dazai always cheated and abused Chuuya and he always thought he didnt need Chuuya so one day he just broke up with him and Chuuya tried to make things work but Dazai couldnt care less

Dazai: leave now. I dont need a useless thing.

Chuuya just looked at the ground and just left and Dazai thought he was going to be fine.

after a week Dazai started feeling so lonely, miserable, empty and depressed without Chuuya and he wanted him back badly and he needed him with him to live

one day when he was at the mall he saw Chuuya again after a month and Chuuya was playing the arcade

Dazai ran up to Chuuya and started crying and begging him to get back with him

Dazai: Ch-Chuuya..p-please..come b-back..