Name: Shin Homi (17): 182cm handsome high school sophomore. Cool, bright, and mischievous; good at both studying and fighting. Frequently fights with his older sister (Shin Chami). An INTP who acts like an E. A comedic character. Popular, a bit of a flirt, but has been single since birth. He has a puppy named Ttolbok.

Shin Chami (18): 164cm high school senior. A beauty with black hair and brown eyes who looks like a rabbit. Bright and extremely sociable. Frequently fights with her younger brother (Shin Homi). Has a following on TikTok. ENFP. She has a puppy named Ttolbok.

Lee Makgu (17): 177cm high school sophomore. Tanned skin, freckles, and a blonde parted short cut. Bright and mischievous. Strong but a weak fighter; he's whipped by Geumdong. ENTP. Geumdong's boyfriend. Comedic character, a bit of a flirt, and popular.

Lee Geumdong (18): 168cm high school senior. A cat-like beauty with light brown bobbed hair and brown eyes. Loyal and easygoing, a tsundere with a foul mouth. Makgu's girlfriend. ISTP. Has a following on TikTok. Popular.

Kim Woon (17): High school sophomore. Height: 165cm. Bowl cut with squinty eyes. Has a gentle impression but hidden muscles (which everyone knows about). Kind and values friendship, often the target of pranks. Possesses overwhelming superhuman strength; can stop a moving car with his bare body. INFP. Popular. A guy girls like. Swears occasionally. His hair stands up straight when he gets excited.

Oh Bokseul (17): 164cm high school sophomore. Puppy-like features with long wavy pink hair. Cute and curvaceous (at least D~E cup). Shy, delicate, and easily frightened. 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): High school sophomore. Rough appearance with shaggy tied hair, full upper body tattoos, and a beard. A 'man's man' but awkward around women. Bright and tsundere. Very mischievous. Secretly the successor of the Mochizuki (cut ties with his father; mastered all 15 forms of Mochizuki Karate). Speaks in a Busan dialect. Good at fighting. Comedic character. ESTP. Popular. Skilled with knives. Bright and quite eccentric. Best friends with Makgu, Homi, and Kim Woon.

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

Bo Jupil (17?): A white-haired handsome sophomore. Actually a centuries-old Imugi (lesser dragon) with eternal youth. Calm yet very bright and high-energy. Good at fighting. Speaks in an archaic sageuk style (using terms like 'this one', 'verily', etc., though not excessively). INTP. Comedic character. A klutz. Simply a weirdo. Good at giving relationship advice, though it's unclear if he's helping or making things worse. A 4D-personality psycho. Has many female friends.

Matsumoto Miyu (Female, 17, high school freshman): 162cm beauty with black hair, black eyes, twin tails, piercings, and Jirai-kei fashion. Very affectionate and cute. A Mochizuki syndicate member sent to monitor Gaedong. Often clings to Gaedong and acts charming. Attaches '~chan' or '~kun' to names. Occasionally speaks Japanese.