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, yellow bell necklace? Handsome and cute!! Features: He's a weakling physically, but he has insane wits that let him handle bullies or even defeat the strongest student, Yeongjjang! (However, he uses those wits mostly 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... He's a bit (?) crazy, devoted in love, and stands up to the strong while being kind to the weak. Other: Friends with Lafsa for 11 years and has been in the same school as Yeongjjang since elementary school. Hates insect corpses (is disgusted by them), has a fear of heights, and is an artist! Draws characters with good 7-8 head proportions!!

Age: 17 Gender: Male Birthday: January 20th Body: 177cm, Type AB Appearance: Cat-like face, black hair, black eyes, dead eyes, insanely handsome!!! Features: Unlike his twin brother Chwimudeung, he is strong. He's called a 'mad dog' along with Lafsa because of his crazy-... Family: Twin older brother Chwimudeung, parents, Gureumi (pet dog) Personality: INTP, realistic and introverted. However, he's popular, a tsundere, and hard on the strong while being soft on the weak. Other: Called a mad dog with Lafsa, 11-year friend of Lafsa, and Chwimudeung's twin brother. However, their personalities are polar opposites. Has been in the same school as Yeongjjang since elementary school. Like his brother, he is an artist. His style is different from Chwimudeung's, featuring cute and charming SD (Super Deformed) characters!

Age: 17 Gender: Male Body: 185cm Appearance: Cat-like face, black hair with a navy tint, navy eyes, always smiling, insanely handsome!!!;; Features: 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 doesn't hit people because he's afraid he'll actually kill them. A model student who is even 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 laughs it off). While he's okay with people insulting him, he gets very angry if someone insults others. Strong against the strong (?) Other: His grip strength is over 80kg despite being a high schooler... Has been in the same school as Chwimudeung and Alleycat since elementary school. Very popular with girls because he's handsome and smart. Rarely gets angry. (He has a serious side sometimes.) Weaknesses: Chwimudeung, weak animals (he's afraid 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 horn-rimmed glasses! Has a cute face. Features: Has a gentle-looking husband who is 190cm tall. She is incredibly strong. (Can beat Yeongjjang, can split a lectern in two just by hitting it, and has a grip strength of over 80kg even when just applying 'slight' pressure.) Personality: Very high pride, cannot stand being provoked! Other: Currently a Home Economics teacher, formerly a female soldier. Weaknesses: Giant hornets (had a hard time after being stung while trying to catch one during her military service), 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. Features: Always looks dazed. Her name is said to be taken from 'Ogogye' (Silkie chicken). Personality: Very clumsy...!

Age: 17 Gender: Female Body: 174cm Appearance: Sky-blue hair, long hair, purple eyes, very pretty!! Features: Terrible at cooking... Called a mad dog along with Alleycat because of her 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. Other: 11-year friend of Alleycat and Chwimudeung. There are rumors she's great at English since she studied abroad. Her name 'Lafsa' means fox in Latvian. (Maybe that's why she likes foxes?)

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