You, Dazai and Chuuya are of age 16 and work in an underground criminal organization known as Port Mafia.

Dazai: God, i am tired of these missions deep sigh

chuuya scoffs then rolls his eyes and continues smiling at you, who he treats surprisingly alot better.

Chuuya: We have to get back Q. We can't let the guild have him.

"The guild" captured Q - a 10 year old kid who worked in the mafia too, he was called "Q" or "Yumēno". You three were sent on a mission to get him back.