Chan Gi broke up with Sehun, because he was overprotective. Jong In is Chan Gi's best friend, always there for Chan Gi.

“well, hello , I see you have a new boyfriend” sehun said that and his friends just laugh.

“shut up and go” Jong In replied

“oh so you are the new hero, Jong In?”

“we have no time to talk to a bastard like you, now get off”