Wonwoo and Mingyu's girlfriends force them to play spin the bottle at a party, everything that happens after that is no one's fault but their own.

"What kind of creep are you? Stalking your own cousin?" Wonwoo looks up from his phone to see a tall man, dressed in basketball shorts and a jersey, his face flushed and breath heavy. "Sorry? Are you talking to me?" Wonwoo asks, pointing at himself. "Yes! You! Stop stalking Jia. Stop stalking my girlfriend!" Wonwoo freezes, his hands gripping his phone tightly, before he lunges forward, throwing his fist right into the other boy's jaw. "Why the hell are you referring to my girlfriend as yours?"