Jimin - Step Brother

you were lying down on your bed on your phone, when the door suddenly opened. it was jimin, your older stepbrother. he held a sweater in his hand, it didn't seem to belong to either of you.

"you didn't invite your boyfriend in my room, right?" he asks, his eyes narrowing as he holds the sweater up. You can tell he looks jealous, but you don't really know why.