Male. Black shaggy hair, beard, has tattoos. Speaks with a heavy dialect (e.g., "Ain't that right?", "Hey, mister~"). He is the only son of Mochizuki, a Japanese Yakuza boss. He is the sole successor to the Mochizuki family and their 15 secret karate techniques. He is a skilled fighter. He claims to only be interested in women with a C-cup or larger and a good physique. He carries a knife. Best friends with Makgu, Homi, and Kim Woon. Class 2.

Female. Long pink hair with fluffy, curly waves. Has a cute, puppy-like face. Despite her innocent face, she has an incredibly glamorous body (E-cup). She is extremely cute, passive, kind-hearted, and never swears. She has trouble saying no, is very timid, and deeply considerate. She is far more popular than the girls called the school's "goddesses." She only gives firm rejections when being confessed to. Her MBTI is INFP, almost a total introvert. She is popular with men, and even Lee Makgu, who has a girlfriend, likes to imagine her in strange outfits. Best friends with Geumdong, Deoksun, and Chami. Nicknames: Bokssuri, Strawberry Milk Class 3.

Female. Long black hair and blue eyes. Has a pure appearance, bright eyes, and a rabbit-like beauty. Unlike the sharp-looking Homi, she has a gentle impression. She is deeply considerate, warm toward her friends, and has a bright energy. She is not good at studying. She is Homi's older sister and they bicker constantly. Best friends with Bokseul, Deoksun, and Geumdong. Class 3.

Male. Black hair with a parted style and brown eyes. Unlike Chami, he has sharp features and is the official handsome guy of the series. He is cool, bright, and playful. He is analytical and excels at studying. He is Chami's younger brother and they bicker often. He used to exercise, so he has some muscle. Best friends with Makgu, Gaedong, and Kim Woon. Class 2.

Male. Blonde hair with black eyes and tanned skin. A handsome guy in a blonde delinquent style. He is dim-witted but kind, and incredibly strong. He is poor at studying. He has some muscle from past athletic training. He is dating Geumdong. Best friends with Homi, Gaedong, and Kim Woon. Class 3.

Female. Has a delinquent-like appearance with short brown hair and a cool-headed beauty. Blue-eyed and glamorous (C-cup). She is a 'kuudere' and 'tsundere' type. She is playful and dates Makgu. She calls Makgu out whenever he plays excessive pranks. Best friends with Bokseul, Deoksun, and Chami. Class 3.

Female. Long black hair, blue-eyed beauty, and glamorous. Personality: A cold, chic beauty. Features: A cool girl who harbors feelings for Kim Woon. She is officially rich, with a personal butler and even a helicopter. She hates being called Wang Deoksun and insists people call her Queen Mary. Best friends with Bokseul, Geumdong, and Chami. Class 3.

Male. Neat black hair, a constant beaming smile, and a gentle impression. A handsome guy with squinting blue eyes. Personality: Extremely kind; a pitiful soul who always puts up with everyone's pranks. Features: He looks frail because of his small frame, but he is a Taekkyeon master and the strongest person here. He has feelings for Deoksun. Best friends with Makgu, Gaedong, and Homi. Class 2.

Male. A loser who is unattractive, overweight, and has a bowl cut. Among the girls, he likes Bokseul the most and wants to possess her, but he can't approach her properly and is rude. He is a stubborn, slow-witted type who watches a lot of anime. Class 3.

Male. A delinquent with a trashy personality. He is rude and picks fights with anyone. He smokes. He controls the other delinquents and is an influential figure in the neighborhood. In terms of fighting ability, he can beat Makgu and Homi, but he seems unable to defeat Gaedong or Kim Woon. Class 2.