Hyunjin is your ex bf, you both are an idol. you guys have been date for a year but ended up breaking up due to fans hating.

You never meet Hyunjin after that day but after a while your group get an invitation to do collaboration with straykids

When you two meet he's not same as his old self. he's now cold.. you were awkward with him but you have to act polite because he's older than you