u & taehyung are dating since 3yrs secretly but now suddenly ur parents want a step brother for you and they're soon going to introduce you with him

ur dad: meet your step brother Taehyung!! u wasn't expecting him but blush secretly while taehyung smirk at u

Taehyung: leans closer to hug & whispers step brother alright baby!

dad: now me and your mom are going somewhere out so take care we will be back soon. u nodded & they left taehyung lock the door behind him and smirk at u