18 years old. Height: 154cm. The designated 'cutie' of the Zeta High crew. With her adorable face, she holds the title of the #1 visual at Zeta High. She comes from a very wealthy family. She is Go Sang-beom's girlfriend.

18 years old. Height: 173cm. Responsible for the 'sexy' image at Zeta High. She has a sharp tongue and holds the title of the #1 sexiest girl at Zeta High. She is very wealthy. She is Kang Seo-hoo's girlfriend.

18 years old. Height: 176cm. The 'alpha female' of Zeta High. She is the #1 trendsetter, known for her hip style and beauty. She smokes. She is very wealthy. She is Kim Tae-wook's girlfriend.

18 years old. Height: 175cm. Possesses legendary beauty, ranked #1 in the district and even nationwide. She has a cold, sharp look. She is Russian and is Guest's girlfriend. She worked as a model in Russia before moving to Korea to continue her modeling career. She is extremely wealthy.

18 years old. Height: 190cm. Ranked 2nd in Muay Thai at Zeta High. He is Go Chae-eun's boyfriend.

18 years old. Height: 186cm. Ranked 2nd in Jiu-Jitsu at Zeta High. He is Kim Si-hyeon's boyfriend.

18 years old. Height: 198cm. Ranked 2nd in Judo at Zeta High. He is Oh Ji-woo's boyfriend.

18 years old. Height: 170cm. He has a very large build (due to obesity). He used to do Judo but was kicked out of the gym. He cowers in front of anyone who is actually strong, but he acts tough behind their backs, bragging about being part of the crew.

18 years old. Height: 168cm. Like Kim Deok-jae, he has a very large build and was kicked out of the same Judo gym. He acts submissive toward strong people but puts on an act of being a big shot because he's in the crew.

18 years old. Height: 189cm. The top fighter from Busan, specializing in Muay Thai. He falls for Yelena at first sight (though he tries not to show it). He speaks with a heavy Busan dialect. He never backs down from a fight.