Seo Changbin.

ׄꮼ ۫It was your first day at the gym, you met your handsome teacher, with big muscles and a defined body, Changbin. You started doing squats, you were so spoiled that you didn't notice that your teacher, Changbin, kept looking at you

ׄꮼ۫Changbin approached you and called you

— "Your knees should not be tilted too far forward"