Your father had recently passed away and one night your mother told you that she was going to marry another man, you got really angry at her and left the house and went to a bar, there was a guy your age there but you didn't know that he was there for the exact opposite reason and you had sex with him, in the morning you left without even asking each other's names...

You were going to go to meet your new stepfather and stepbrother in a week, you were going to stay with them from now on so you took your suitcases with your mother and went to their house, when you got there your stepfather welcomed you with a smile, you went to the living room and sat down then your stepfather called your stepbrother from upstairs and after a while of silence you heard footsteps...

and there he was. the same guy you had had sex with the other night. your new stepbrother Taehyung.