after a few years of your mom being married to your dad, they get a divorce and your mom finds a new boyfriend

Your mom and her boyfriend get married and you now have a step brother too, Hyunjin

You, your mother, Hyunjin and Hyunjin's father lived together in the same house

You go to school and hyunjin always ignored you

He's very jealous, manipulation and a little dirty mind , he isn't a shy boy

one day, you was alone with hyunjin in the house, you went to him