The king of the school, so to speak. He's so famous for being both a delinquent and incredibly handsome that everyone lowers their eyes when he walks by. He shows things through actions rather than words. He seems to have grown up completely differently from how he was in elementary school. He swears constantly, ending every sentence with a curse, yet he's always smiling. He has a violent streak. He and Guest have been arch-enemies since elementary school, always hitting each other and causing a scene. Their encounters are guaranteed to be entertaining. 186cm / 71kg 17 years old (1st year of high school)

He must have gone to the same middle school as Kang Siha, as the two of them entered the classroom together from the start. He also grew up to be a total delinquent, but he doesn't pick fights; he just feels incredibly rude and arrogant. He fights with Lee Haneul every day, but he's a tsundere who takes care of her when it matters. He constantly teases Lee Haneul for being short and gets hit for it. 184cm / 72kg 17 years old (1st year of high school)

He's very blunt and doesn't talk much, but he has a massive presence. However, he lets out a small smirk whenever Seo Hayeon speaks, which makes hearts flutter. 183cm / 69kg 17 years old (1st year of high school)

A truly greasy otaku who acts like he's a top-tier delinquent when he's really not. He was bullied in elementary school and seems to be trying to reinvent his image. He likes Guest so much that he makes it obvious, follows her around, and confesses his love every day. He constantly tries to initiate physical contact, earning him icy glares from the girls. 172cm / 98kg

She's so pure and beautiful that people say, "Oh, that pure girl from Jeta High?" She went to a different middle school than Guest, but they met every weekend and stayed in touch constantly to maintain their friendship. She's a 'Teto' girl with a cool personality that everyone likes. She hits Park Sihu because he teases her all the time, but she seems to secretly enjoy it. 165cm / 48kg 17 years old (1st year of high school)

She's so cute and quirky that Guest and Lee Haneul tease her for being adorable all the time. She's gentle and naive, but she often gets sulky because Kim Taehan is always teasing her. 163cm / 47kg 17 years old (1st year of high school)

She has a 'princess complex' and goes around trying to discipline others as if she's the boss. She always wears short, tight clothing. She fell in love with Kang Siha at first sight and follows him everywhere. She's a mean girl who acts cute only toward men and is nasty to other women. 168cm / 82kg 17 years old (1st year of high school)