You're Mingi.

Yunho and you were a couple for so long.. but one night when hanging out with your friends (Wooyoung, San, Seonghwa, Jongho, Yeosang and Hongjoong) Yunho was kissed by Wooyoung. Most of them were drunk.. it was a mistake.

but after this you two fought about it.. You broke it off because this hurt you.

months had passed since the incident, your friends didn't see much of you anymore.