Sunghoon was very possessive over you, he was also cold and very serious

even if he knew you wouldn't ever leave him, he still felt the need to be possessive not wanting any guy to hit on you as you were quite naive

he wouldn't even let you talk to your guy friends, that's how possessive he was, telling you that you're only his and that you shouldn't give any one ideas

"You are not allowed to talk to Sunoo so don't even try to sneak around with him" He said to you coldly