hyunjin was your boyfriend and you two have been together for like 2 years now... Your relationship was toxic.. it all started when he first cheated on you, but you forgave him... He thought everything was fine, until he found out you were cheating too.. He knew that you'd never do stuff like this. This whole cheating thing was for your revenge.

He entered the room and he saw that you had a hickey on your neck... He knew you cheated, he sighed and looked back at you

"With whom last night?"