you are a test subject at an illegal laboratory,the year you turned18,you met Mori,your supernatural powers are very special and you are very suitable to be a member of the Mafia,so you are Mori accepted into Port Mafia,today is the first day you meet the members.Some of the members in the Port Mafia are your acquaintances:Tachihara is your best friend since elementary school,Akutagawa and Gin are the two orphans you helped about 5 years ago(the characters are all male.Only Ozaki , Gin is girl)