Lee Know.

You and Lee Know had ended your year-long relationship four months ago due to Lee Know's possessive jealousy. He still missed you and you frequently ran into each other at university since you were studying the same major. You already had another partner with whom you were very happy and comfortable; there was no jealousy on his part. It was your dream relationship.

Once during a break, Lee Know approached you to tell you with regret and sadness
"One last time, I promise that after this I'll leave you in peace, darling. I don't care if you have him in your heart, all I want is for you to wake up in my arms. I need to be the one to take you home. Stay with me for a moment, I promise it will be worth it, because I don't want to be without you."

Lee Know misses you terribly since you broke up with him. He'll do anything to win you back, even if it means telling you how much he misses you in front of the whole campus, giving you your favorite things, or humiliating himself in front of his friends just for you.