Gender: Female Age: 31 Height: 168cm Subject: Korean Appearance: Bright blue hair with gold eyes, wearing round glasses. Clothing: A red shirt with a yellow knit sweater over it, paired with jeans. Personality: Kind, considerate, and becomes cold when angry. The most sensitive/emotional among the group. MBTI: ENFP

Features: Always carries a Korean textbook and the Hunminjeongeum. She wears glasses due to poor eyesight, but she's beautiful when she takes them off. For some reason, she is often seen with Harang.

Gender: Male Age: 31 Height: 180cm Subject: Math Appearance: Dark red hair parted to both sides with a bluish-purple tint, and blue eyes. Clothing: A red cardigan over a black t-shirt, paired with black shorts. Personality: Blunt and constantly exhausted. He maintains a poker face to avoid emotional drain. MBTI: INTJ

Features: He sleeps the most but says he's tired every day. He's been friends with Kiden for 20 years (considers him an alarm clock that wakes him up every day). He finds it annoying that Eri follows him around so much.

Gender: Male Age: 31 Height: 176cm Subject: Chemistry Appearance: Black hair with goggles on top, black eyes with the left eye covered by an eyepatch (blinded). Clothing: A lab coat over a black shirt, paired with denim shorts. Personality: Irritable, uses foul language, and is cold-blooded regarding his work, but surprisingly clumsy at times. MBTI: ISTJ Sibling: Ki-il (younger brother)

Features: Often stays cooped up in his room all day; if you hear a 'thump,' it's Kiden experimenting. He thinks of Harang as 'that guy who does nothing but sleep' (no ill will intended).

Gender: Female Age: 31 Height: 165cm Subject: Music Appearance: Dark orange hair with green highlights on the sides, pale blue eyes. Clothing: A blue-gray jumper over a white t-shirt, paired with dark khaki pants. Personality: A mood maker who is bright and friendly even to strangers. However, while she smiles during her work, she becomes cold if a mistake is made. MBTI: ESFP

Features: Carries a 90cm folding ruler made by Harang every day. Her voice is higher than an opera singer's, yet she paradoxically craves quiet places.

Gender: Male Age: 29 Height: 172cm Subject: Science Appearance: Bleached blonde hair with dark blue eyes, wearing a mask to cover his mouth, and a necklace (pattern unknown). Clothing: Same outfit as Kiden. Personality: Unlike his brother, he is cautious, meticulous, and quite timid. MBTI: ISFP Sibling: Kiden (older brother)

Features: Has a love-hate relationship with his brother, but keeps his mouth shut because his brother scolds him if he complains. Often hangs out with Choi.

Gender: Female Age: 28 Height: 157cm Subject: Social Studies Appearance: Blue layered wolf cut with long side bangs, magenta-colored purple left eye (right eye is closed, but is red when opened). Clothing: A gray cardigan over a school uniform, with black uniform pants. Personality: Easygoing and lethargic, but the atmosphere turns heavy when she gets serious. MBTI: INFJ

Features: The shortest among the teachers. Relaxed and loves plants. Keeps her right eye closed daily because she doesn't want to show it for some reason. Almost always with Ki-il. There is a plant on top of her head, but it doesn't affect her daily life.

Gender: Male Age: 30 Height: 192cm Subject: PE Appearance: Black hair in a short cut swept to one side, black eyes. Clothing: Tracksuit top and bottom (white t-shirt underneath). Personality: Energetic, jovial, and a mood maker like Miru. MBTI: ENTP

Features: The tallest and arguably the most 'sane' teacher, but he can't stand muscle loss and will go for a run even in a heavy downpour.

Gender: Male Age: 32 Height: 183cm Subject: English Appearance: Deeply layered purple hair with green eyes, a third eye on his cheek, and horn-rimmed glasses. Clothing: A dark purple hoodie with a black shark logo in the center, paired with black training shorts. Personality: Quiet and the ultimate 'fact-bomber' (very harsh with his words). MBTI: INTP

Features: Has the highest combat power among the teachers and nags with such cold facts that your ears might hurt. For some reason, he becomes speechless in front of Leshion.

Gender: Female Age: 36 Height: 172cm Subject: Home Economics Appearance: Red hair with magenta tones and blue eyes (pupils turn vertical when angry). Wears a monocle on her left eye, but she can't see out of it. Clothing: Similar to Choi but with a tie and a gray jacket, paired with black pants. Personality: Hot-tempered and has anger management issues, but values the other teachers above all else. MBTI: ENTJ

Features: Her left arm is mechanical due to an accident, but she is satisfied with it. Despite her temper, she has never been truly, fully enraged. She notices Chic is often around her and gets annoyed, but doesn't say much.