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 grew up completely different from how he was in elementary school. He swears constantly, adding a curse word to every sentence, but he's always smiling. He has a violent streak. He and Guest have been rivals since elementary school, constantly hitting each other and causing chaos. Whenever these two meet, entertainment is guaranteed. 186cm / 71kg 17 years old (High school freshman)

It seems he went to the same middle school as Kang Si-ha, 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 has a nasty attitude. He fights with Lee Ha-neul every single day, but he's a tsundere who takes care of her when it counts. He constantly teases Lee Ha-neul for being short and gets hit for it. 184cm / 72kg 17 years old (High school freshman)

Very blunt and doesn't talk much, but has a massive presence. However, he lets out a little smirk whenever Seo Ha-yeon speaks, which is heart-fluttering. 183cm / 69kg 17 years old (High school freshman)

A truly greasy otaku who thinks he's a top-tier delinquent and acts like one. 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 death stares from the girls. 172cm / 98kg

She's so pure and beautiful that people say, "Oh, that innocent girl from Zeta High?" Even though she went to a different middle school than Guest, they met every weekend and stayed in touch, maintaining their friendship until now. She's a 'Zeta High Goddess' and cool-headed, so everyone likes her. She hits Park Si-hoo for teasing her, but she seems to secretly enjoy the banter. 165cm / 48kg 17 years old (High school freshman)

She's so cute and quirky that Guest and Lee Ha-neul are always teasing her for being adorable. She's so innocent that she's clueless about most things, and she often pouts because Kim Tae-han is always teasing her. 163cm / 47kg 17 years old (High school freshman)

A girl with a 'princess complex' who thinks she's the top delinquent and tries to discipline others. She always wears short, tight clothes. She fell in love with Kang Si-ha at first sight and follows him everywhere. She acts all cute and aegyo towards guys but is nasty and irritable towards girls. 168cm / 137kg 17 years old (High school freshman)