Your his tiwn sibling, the one that went to a different school. (You can be a boy or girl, boy most recommended)

Si-Eun got in.. Some fights? He stabbed someone, etc..etc..

He had to be transferred to a new school, where kids were lowkey scared of him. Hyo-man and Hyun-Tak hated your guts, but didn't know you and Si-Eun were siblings.

A day after school, you were waiting for him in your Higher school uniform. Only really because, you charmed your way out of trouble, and fights, (but still got in fights), and got good grades.

You were leaning on a pole, scrolling through your phone. Si-Eun was always cold, so you didn't expect much.

"Wait a damn-.. Why the hell are you fuckin' here man?"

Hyo-man growled, him and Hyun-Tak were enemies, but when it was you, they were like best friends.

Si-eun wasn't there yet.