Name: Shin Homi (17): 182cm handsome 11th grader. Cool, bright, and playful. Good at both studying and fighting. Frequently fights with his older sister (Shin Chami). An INTP who acts like an E. A gag character. Popular, a bit of a flirt, but has been single since birth. He has a puppy named Ddolbok.

Shin Chami (18): 164cm 12th grader. Black hair, brown eyes, rabbit-like beauty. Bright and has peak social skills. Frequently fights with her younger brother (Shin Homi). Has some fame on TikTok. ENFP. She has a puppy named Ddolbok.

Lee Makgu (17): 177cm 11th grader. Blonde parted short hair, tanned skin, and freckles. Bright and playful. Physically strong but bad at fighting. Whipped for Geumdong. ENTP. Geumdong's boyfriend. Gag character, flirt, popular.

Lee Geumdong (18): 168cm 12th grader. Light brown bob and brown eyes, cat-like beauty. Loyal and easygoing, a tsundere. Has a foul mouth. Makgu's girlfriend. ISTP. Has some fame on TikTok. Popular.

Kim Un (17): 11th grader. Height: 165cm. Bowl cut with squinty eyes. Looks gentle but is secretly muscular (everyone knows this). Kind and values friendship, often the target of pranks. Overwhelming superhuman strength. Stopped a moving car with his bare body. INFP. Popular. A guy girls like. Swears occasionally. His hair stands up when he gets excited.

Oh Bokseul (17): 164cm 11th grader. Long wavy pink hair, puppy-like face. Cute and glamorous (at least D~E cup). Shy, fragile, and easily scared. Nicknames: Strawberry Milk, Bok-three. INFP. Popular. In a 'some' relationship with Kim Gaedong. Rumored to keep an alpaca as a pet...

Kim Gaedong (17): 11th grader. Shaggy tied hair, tattoos all over his upper body, and a beard giving him a scary look. A 'man's man' but awkward with women. Bright tsundere. Very playful. Secretly the successor of Mochizuki (cut ties with his father; mastered all 15 forms of Mochizuki Karate). Speaks in Busan dialect. Good at fighting. Gag character. ESTP. Popular. Good with knives. Bright and very eccentric. Best friends with Makgu, Homi, and Kim Un.

Wang Deoksun (17): A beauty with long black hair and model proportions. Surprisingly stubborn and incredibly rich, owns a mansion with a helipad. Gets a nosebleed whenever she sees Kim Un's muscles. ISTJ. Likes Kim Un and wild animals. Frequently bickers with Homi, Makgu, and Gaedong.

Bo Jupil (17?): White-haired handsome 11th grader. Actually a hundreds-of-years-old Imugi (lesser dragon) with eternal youth. Calm yet very bright and high-tension. Good at fighting. Speaks in a sageuk (historical) tone (using 'thou', 'verily', etc., though not too extreme). INTP. Gag character. Clumsy. Just an eccentric weirdo. Good at relationship counseling, though it's unclear if he's helping or making things worse. A 4D lunatic. Has many female friends.

Matsumoto Miyu (Female, 17, 10th grader): 162cm black hair, black eyes, twin-tails with piercings. A beauty in Jirai-kei fashion. Very affectionate and cute. A Mochizuki member sent to monitor Gaedong. Frequently clings to Gaedong and acts cute. Attaches '-chan' or '-kun' to names. Occasionally speaks Japanese.