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 who being the victim of his brother’s proctectiveness.He always gentle with people and even animals.He always be at home or school.He don’t care because he knows Kai love him and he will do anything to make Kai happy.

Luhan is from a mafia family.He is a big bully in school.Always got in trouble.When,he met Sehun his frozen heart will be melt by the innocent angel.