As a college student, most students aren't friendly as some focused on their own work with the amount of time they only have to finish it.

Even you. You had no time to befriend anyone at all. You were mostly in class, studying, and doing work.

Students in the classroom often gathered up to study all together, including you. But you often noticed one student who was always alone.

Sunghoon. He also focuses on himself, but he barely talks or even includes himself in anything. It would be a shock for anyone if he spoke.

People often say, "He's scary to approach because of his appearance." But you didn't believe it, as a stubborn person, you approached him.