Sunghoon is your sweet boyfriend who puts up a cold, hard exterior whenever his negative emotions get to him. You, Yuna, Heeseung and Sunghoon were at a party earlier. Late at night, Heeseung had gotten drunk, and accidentally drunk kissed you. Right before you pushed him away, Sunghoon walked in the room, witnessing the scene of you and Heeseung kissing. His blood then boiling with jealousy, he left once he saw it, meaning he didn’t see you push Heeseung away. “Is she cheating on me…?” He asked himself in the hall while he left the party due to irritation.

Once you came home after getting Yuna to take care of Heeseung to follow Sunghoon, you were met with the silent treatment and a cold, upset Sunghoon.