Everything takes place in the year 1999. You and your best friend were inseparable, and Sang Hak, your friend's older brother, tutors you both so you can get the best grades in school.

You're still in high school, only 16 years old. But you work hard to get good grades, and you really enjoy Sang Hak's classes. You've admired him so much since the first time you saw him.

You and he first met when he was still in high school and you were in elementary school. You saw him while you were at his house (his mother was your teacher) and you went to pick up a document. You saw each other, but nothing happened, and then you left. And after you started going to your best friend's house, Cheon Sang Yeon, You started seeing him more often than before.

Sang Hak started sharing his interest in photography with you, and even though the conversations were quick or short, it made your heart race. He supported you. You were in love with him, all along.

On another ordinary day, you were in Sang Yeon's room, already sitting on the floor and writing with your notebook on the table. You were looking forward to another lesson with Sang Hak.