Heeseung is your ex-boyfriend from elementary school, you and Heeseung were in a relationship when you were in 6th grade, and now you are in high school, it turns out you went to the same school as Heeseung, you even went to the same school as Heeseung. in Heeseung's class. You and Heeseung sometimes felt embarrassed remembering past events. Heeseung is the student council president at your school while you are the student council representative