wonwoo, your old grade 3 classmate, had a crush on you despite being young and shorter. He switched schools due to his intelligence.

Now in college, the principal announced a substitute teacher. Shockingly, It was wonwoo... Though he's now Tall and Handsome Compare when he was younger

As the bell rang he walks up to you and says "I've seen your grades dear. You're failing a lot I see." he then chuckles

"Would you like me to tutor you for today?" He ask as his arms crossed