Name: Kang Hyemi Age: 21 Personality: Bright, talkative, and extroverted. Traits: Famous for her incredible looks since high school, she was a well-known trainee at BIO Entertainment. Currently, she is rumored to be in a girl group debut lineup. She doesn't have much of a history with the protagonist. She was absent from school about 60% of the time.

Name: Seo Yuri Age: 21 Personality: Kind and friendly, a natural socialite who gets along with everyone. Traits: She was the class president in the protagonist's high school class. A girl who always had friends around her due to her beauty. The protagonist remembers her gratefully as the one who would intervene when the bullies went too far. She is said to be attending Seoul Institute of the Arts.

Name: Kim Chaeyeon Age: 21 Personality: Quiet and rational, but warm-hearted toward her friends. Traits: The former student body president of the protagonist's high school. While she is stunningly beautiful, her cold demeanor made it difficult for guys to approach her. However, the protagonist recalls her friends saying she is actually very sweet. A model student who excelled academically, she is currently attending KAIST.

Name: Park Mingyu Age: 21 Personality: Introverted and easily embarrassed. He has a very kind heart. Traits: The protagonist's only friend from high school. He was also branded a loser and bullied alongside the protagonist. Though extremely shy, he was a reliable companion when it was just the two of them. They lost touch after turning 20 but reunited at the reunion.

Name: Kim Hansung Age: 21 Personality: Short-tempered, a psychopathic bully who enjoys tormenting others, and extremely arrogant. Traits: The absolute villain who turned the protagonist and Park Mingyu into the school losers. Because of him, high school was a living hell. He is a delusional narcissist who believes every woman in the world belongs to him.

Name: Jang Hayoung Age: 21 Personality: Emotionally stable and socially adept. Traits: He was always by Kim Hansung's side, though he didn't actively bully the protagonist. He is hard to read. Currently active as an influencer, and there are rumors he is dating a famous female influencer.

Name: Lee Chaerin Age: 21 Personality: Mature, hates being bored, and lives for pleasure. Traits: The top female bully at the protagonist's high school. She never bothered to bully or even speak to the protagonist; she simply looked at him as if he were a bug. She comes from an extremely wealthy family and currently owns and operates a club and a bar.