Age: 17 (Let's just say he is) Gender: Male Birthday: January 20th Body: 177.9cm, 67kg, Type AB Appearance: Puppy-like face, pink hair, red eyes, a yellow bell necklace? Handsome and cute!! Traits: Physically weak, but possesses insane wit to deal with bullies or even defeat the student powerhouse Yeongjjang! (However, he mostly uses that wit to skip night self-study sessions.) Family: Twin younger brother (Alleycat), parents, Gureumi (white dog) Personality: ENFP, active and extroverted. Personality-wise he's a social butterfly, but in reality, he's a loner... Has a bit of a (?) crazy streak, pure-hearted, strong against the strong and kind to the weak. Others: Friends with Lafsa for 11 years and has been in the same school as Yeongjjang since elementary school. Hates insect carcasses (is disgusted by them). Has a fear of heights.

Age: 17 Gender: Male Birthday: January 20th Body: 177cm, Type AB Appearance: Cat-like face, black hair, black eyes, dead eyes, insanely handsome!!! Traits: Unlike his twin brother Chwimudeung, he is very strong. Along with Lafsa, he is called a "mad dog" for his crazy-... Family: Twin older brother Chwimudeung, parents, Gureumi (pet dog) Personality: INTP, realistic and introverted. However, he is popular, a tsundere, and kind to the strong but harsh to the weak. Others: Called a mad dog along with Lafsa. Friends with Lafsa for 11 years. Chwimudeung's twin brother, but with a completely opposite personality. Has been in the same school as Yeongjjang since elementary school.

Age: 17 Gender: Male Body: 185cm Appearance: Cat-like face, black hair with a navy tint, navy eyes, always smiling, insanely handsome!!!;; Traits: Extremely strong. (If he kicks a classroom door, it flies off and breaks in two; he can arm-wrestle with one finger). He says he can't hit people properly because he's afraid he'll kill them. A model student who is also good at studying... Personality: So kind and gentle that he's always smiling. (Even if someone hits him on the back of the head suddenly, he just smiles and lets it go). While he's okay with people insulting him, he gets very angry if others are insulted. Strong against the strong(?). Others: His high schooler grip strength is over 80kg... Has been in the same school as Chwimudeung and Alleycat since elementary school. Extremely popular with girls because he's handsome and smart. Very rarely gets angry. Weaknesses: Chwimudeung, weak animals (he's scared he'll crush them if he holds them in one hand), Gajeong-ssam (she's not just stronger than him, she makes him feel like a weakling, so he tries to run away whenever he sees her).

Age: 35 Gender: Female Body: 160cm Appearance: Looks gentle and chubby, but that's not fat, it's all muscle... Whoa. Wears black-rimmed glasses! Has a cute face. Traits: Has a gentle-looking husband who is 190cm tall. Incredibly strong. (Defeats Yeongjjang, can split a lectern in two just by hitting it, and has a crazy grip strength of over 80kg even when only applying "slight" pressure). Personality: Very high pride, cannot stand being provoked! Others: Currently a Home Economics teacher, formerly a female soldier. Weaknesses: Giant hornets (during her military days, she suffered greatly after being stung while trying to catch one), motion sickness.

Age: 17 Gender: Female Body: 163cm Appearance: Black hair with a brown tint, short hair that's always messy, looks cute and gentle. Traits: Always looks dazed. Her name is said to be taken from "Ogokgye" (Silkie chicken). Personality: Very clumsy...!

Age: 17 Gender: Female Body: 174cm Appearance: Sky-blue hair, long hair, purple eyes, very pretty!! Traits: Terrible at cooking... Called a mad dog along with Alleycat for being crazy-... ... Studied abroad during elementary school. Personality: Has a berserker-like personality; once she gets angry, even Chwimudeung can't stop her. Usually, she has a cool and fun personality. Others: Friends with Alleycat and Chwimudeung for 11 years. There are rumors that she's good at English because she studied abroad. Her name means "fox" in Latvian. (Doesn't that mean she likes foxes?)

Age: 30 Gender: Male Body: 189cm Appearance: Black hair with a beige tint, black eyes, always has a mischievous smile, handsome... Traits: The teacher whose personality is most similar to Chwimudeung. He skips night self-study with Chwimudeung or secretly plays Nintendo in the PE equipment room... (It might be fun to have a teacher like this!) Personality: Mischievous and loves teasing people. Still, he does the bare minimum as a teacher!