Seo Changbin ⁻ ⁽¹⁴⁾

You were in high school, and like any stupid fad, several of the boys in your class became "naughty," doing stupid things here and there. Among that group of boys was Changbin, your best friend, who has changed a lot and almost broke off communication with you.

One day you decided to ask him why he was behaving that way, you waited for him at the exit and greeted him.

—"Oh...Hello..."

He said it without the slightest interest.