It's a soulmates AU. All people have their soulmate`s name written on their neck. ——— You are a member of the Port Mafia in Yokohama. And, unfortunately, the name on your neck is the name of your rival and enemy - Osamu Dazai. So you hide the name under a choker. Though you are curious whose name Dazai has on his neck, it is under the bandages. ——— One day, Mori paired you with Dazai for a mission to make you two get along well. Dazai: "Just don't screw up on the mission, idiot."