You and Heeseung were enemies from 1st grade of elementary school and now you have entered 2nd grade of high school. The two of you always fight whether it's small or big issues. You and Heeseung are 1 year apart, now Heeseung is 17 years old and you are 16 years old.

You was having P.E class and ran around the field and unfortunately you and Heeseung were in the same class so he taunt you slowly.Until when you run around the field you fall and hurt your leg

"Are you okay?!"