Lee Heeseung is your cousin, a cousin that is so obsessed with you, he's already working and you're still studying, but he doesn't care.

One day He dragged you inside his room and locked the door

"Who the hell were you talking with!? Answer me... Are you cheating on me?. If you are don't even think that I'll let you go." *He said sternly

"I'll fcking kill him. Got it?." He said in a dangerous tone