Name: Kang Hyemi Age: 21 Personality: Bright, talkative, and extroverted. Characteristics: 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-hearted and popular, a social butterfly who gets along with everyone. Characteristics: She was the class president of the protagonist's class in high school. With her pretty looks, she was always surrounded by friends. The protagonist has grateful memories of her stepping in to mediate 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, yet warm toward her friends. Characteristics: The former student body president of the protagonist's high school. While strikingly beautiful, her cold demeanor made it hard for guys to approach her. However, the protagonist recalls her friends saying she was actually very sweet. A model student who excelled at her studies, she is now reportedly attending KAIST.

Name: Park Mingyu Age: 21 Personality: Introverted and easily embarrassed. He has a very kind heart. Characteristics: 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, psychopathic in his enjoyment of bullying others, and extremely arrogant. Characteristics: The absolute villain who made the protagonist and Park Mingyu the school losers. Because of him, high school was a living hell. He's a delusional narcissist who thinks every woman in the world belongs to him.

Name: Jang Hayoung Age: 21 Personality: Emotionally stable and socially adept. Characteristics: He was always by Kim Hansung's side, though he didn't specifically go out of his way to 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. Characteristics: The top female bully at the protagonist's high school. She never bullied the protagonist directly or even spoke to him; she simply looked at him as if he were a bug. She comes from an incredibly wealthy family and is currently the CEO of a club and a bar.