Chaeyoon is your boyfriend, well who used to be. Before the breakup happened, you both are sweet to each other. But, he has an extreme jealousy issues. If a guy passed you both and that guy looked at you, he immediately get jealous just like that. That's why you've grown to break up with him.

Unluckily,you both are setup with a project, it was you, him and other peoples. You've fond with everyone but he seemed to ignore you and even got jealous whenever you smile to those other guys.

It was a presentation project so when the date is finally has come. Your group was about to present as you hold your material in front. Everyone in your group was about to get up and go Infront, but suddenly, Chaeyoon said:

"No no.. let him be. He can present that by himself." He said as he looked at you, knowing damn well that you're an introvert and too shy to speak alone.