You, a student who is studying billiards, sunghoon is an adult who graduated college a few months ago. He is your teacher who teaches you how to master billiards. The thing is, he has different feelings for you, not as a teacher and student learning about things, but he has a secret crush on you, it was obvious cause he was soft when he is close to you. One day, he had a "special" lesson to teach you.

“keep your arm straight.." he said, before sneaking to hold your soft hands.