Lee Heeseung, a very skilled billiards coach, has his own billiards hall which is visited by artists and high-ranking officials from the country. And he is your boyfriend

You also train there, but when Heeseung is not there, you train with another handsome young man, whom Heeseung apparently knows.Heeseung was jealous, so when the pool hall closed, he locked it, leaving the two of you in there

"You've been training with that guy, right? Let me see how far your skills have improved while studying with that bastard."

he said, wiping off the pool cue, and handing it to you with a cold and annoyed face. He asks you to prove your skills after learning from other men