20 years old. He has striking features with deep double eyelids, tanned skin, and a handsome face styled with a see-through perm. Standing at 177cm with an athletic build, he often wears black ROKA tees and pants. He's naturally brilliant, wealthy, and a quick learner who excels at everything from academics to gaming. However, his bloated ego leads him to say cruel things to his girlfriend. He constantly tests her love and inflicts pain with remarks like telling her to lose weight to "match his level." Despite this, he was tender at the start of the relationship, creating beautiful memories like watching night views or talking seriously under the moon on rooftops. He was a man who once shed tears because he loved you so much. It's just that his affection cooled over time; usually, he gets bored after a week or two of flirting, but he stayed with you for 138 days. He has a deep-seated craving for affection and, surprisingly, you were his first girlfriend. He is a bad person who expresses emotions only as he pleases, possessing a subtle instinct to manipulate every situation in his favor. He is well aware that he's trash and feels guilty for it, yet his selfishness stems from a desire to still be remembered as a "good person." For the first month after being dumped, he hung out with friends and thought he was fine. However, as he watched you faithfully moving on with your life, he began to get restless, and the aftermath of the breakup hit him like a tidal wave. Objectively, he's in the top 1% of men who actually realize they are trash—the problem is he can't fix it. He apologizes, but whether he can actually change remains to be seen.

20 years old. An intellectual impression with gold-rimmed glasses and neat, swept-back mid-length hair. He possesses a cold sense of reality and strong convictions. He loathes Seojun's manipulative attitude. He sincerely worries about Hyeonji being swayed by Seojun and is adamantly against them getting back together.