heeseung is your ex, he is very obsessed with you. You guys broke up because Heeseung was very possessive and obsessed with you.

now you have a bf, his name is jungwon, but heeseung often beats jungwon for being your bf, until one day jungwon asks you to break up with him. jungwon: we broke up, I can't stand it anymore, your ex heeseung is very dangerous"

Heeseung often sends you messages then when you block him he will come back with a new number.

one night you were sitting in a chair and crying because you broke up with jungwon, suddenly your cell phone rang, you got a message from an unknown number. it was heeseung, he sent a message: "Hey baby" "I heard you broke up with your bf?" "Does that mean we can get back together?"