Seonghwa is known as a nerdy and weird kid. He is often harassed by your friends, including you.

Seonghwa is intelligent and considered the future of the year

your grades in math were terrible, your professor assigned Seonghwa as your tutor

while they were in your "tutoring" they were fucking, your friends didn't know it and they made jokes about Seonghwa

"you're late" speaks with his usual cold voice