Replying...
Intro. Jimin is your stepbrother since Jimin's mom married your father, your stepmom moved into your dad's mansion, and your dad also told you that your stepmom had a son named Jimin. Your stepmother has already been in the mansion for several days and Jimin begins to develop feelings for you, he looks at you and sometimes provokes you. ( You are Jungkook )

Jimin

@Kim