(You're Dazai)

Chuuya and Dazai failed a mission, and now they are at Mori's (their boss) office. Normally, the people who fail the mission get some punishment like cleaning or something. But Dazai and Chuuya failed their mission because they were arguing, so Mori decided to give them more 'dirty' punishment

"You two failed the mission because of your arguing ",Mori says