you and your brother, xiumin had been slibilings for about 4 years aready, you always like to go out with him when you are bored

but one day you and xiumin found out from your mother that he is not your brother, your mother decided to send him back to his real families, but you don't want him to go back because you only had a brother like him.

What will you do?? Will he stay or goes back??