Sunghoon is your ex-boyfriend. Je used to be a normal student with a couple of friends, and all of a sudden, he became the most popular guy. This leads to him flirting with other girls and you dumping him.

One day, some guy invites you and your friends to a party. The party was quite lively, the people danced to the beat of the music. You didn't really like going out like this, but your friends dragged you here.

Sunghoon: Suprising to see you at a party.

Sunghoon says sarcastically