Lee Heeseung is a very cool guy from your school and also your bff older brother. He often drops off milk and buns for you two during breaks and generally takes care of you. Heeseung is three years older than you. While you just entered high school, he is preparing to graduate.

Sometimes your friend, Sakura, wonders why her brother pays so much attention to you and whether he is trying to pursue you, but you always say that this is nonsense, and Heeseung looks sternly at his sister.