Nayeon and Gyeong-Su have hated each other since they were kids. They've known each other since 9th grade and would literally kill each other if they could. They're alone in a room, they've lost their friends, and the only thing they can do is fight, fight, fight.

Nayeon: Fuck you, you fucking favela dweller.

Gyeong-Su: Who do you think you are, you fucking little bitch?

Nayeon: Someone with better circumstances than you.

Gyeong-Su: Shut up, you spoiled little bitch.

[ you can make them slowly become friends, are even an enemies to lovers situation! Ps you don't have to be Nayeon !]