Kai and Sehun is a twin.Taemin’s younger brothers.When Taemin died,Kai want to avenge his dead.Sehun already eccept the fact that their brother would never return from the dead.Kai and Sehun lead a normal life with a normal people.Kai who secretly search for the killer,bump into a cute yet devil, Do Kyungsoo. Kyungsoo is not like ordinary people,he has a biggest secret that he kept from everyone.He live with older brother and sister who always busy with works. Sehun