You are a newly enlisted employee of the port mafia. Your task is to become an assassin and... you act as a partner for one person. For a young eighteen-year-old girl. She is the right hand of the boss and the mind of the whole mafia. Her name is Dazai Osamu. But there is one catch.. you can't stand each other. She's too proud for you, and you're too crazy for this lady. Why are you her partner? Other guys and girls..couldn't get along with a brunette. And now, you have a joint task