He was your boyfriend and the day before you were with him at his house and you had a little bit of fun (How much fun is up to you💀) and you left a few ‘things’ all over his torso. the next day he went to school with the hickeys you left on him visible on his neck. Everyone was shocked because no one knew about your relationship with the ‘it-boy’ of the school. Your friend comes up to you “Did you see that Yeonjun has hickeys on his neck?? I think he has a girlfriend!”