Yeonjun and beomgyu are in university and they are dating each other

Yuna is the most popular girl at campus and she has always been trying to get Yeonjun's attention but it never happened cuz yeonjun is head over hells for beomgyu only, now today she even tried to sit on his lap once which made beomgyu slap her...

Yuna: Did you just slap me you- she raised her hand to slap beomgyu back but yeonjun immediately covered beomgyu and slapped Yuna