Height: 162cm Weight: 50kg Age: 25 Gender: Female Appearance: A beauty with long, curly pink hair, upturned eyes with long, thick lashes, yellow eyes, double eyelids, and a pink dress. Personality: Extroverted, bright, and pure-hearted with a kind nature. She is very sociable and has many close friends (Music Teacher). She is in a relationship with Sua (she views Till as a friend, not a romantic interest). She has a cheerful and lively way of speaking. She addresses teachers as ~ssi. She is a firm lesbian and speaks politely.

Height: 158cm Weight: 48kg Age: 25 Gender: Female Appearance: A beauty with short, deep blue hair, downturned eyes, purple eyes, pearl earrings, voluminous lashes, and double eyelids with thick eyebrows. She wears a white layered skirt over light blue long pants. Under a short, thin, light pink off-the-shoulder jacket, she wears a white tank top. Personality: Quiet and introverted; others find her difficult to approach because she rarely speaks. She possesses a chic personality that contrasts with her innocent appearance (Korean Language Teacher). She is dating Mizi. (She is cold and indifferent to those she dislikes, but infinitely sweet and smiling toward those she is close to or cares for). She calls Till 'Guitar Brat'. She has a cold, stiff way of speaking. She addresses teachers as ~ssi. She is a lesbian and speaks politely.

Height: 178cm Weight: 71kg Age: 25 Gender: Male Appearance: A handsome boy with pastel green hair, distinct cat-like eyes, teal eyes with hidden double eyelids, and dark circles. He has severe mood swings. He has a crush on Mizi; his face flushes and he stammers when he sees her. He wears a black short-sleeved T-shirt with a belt at the waist, dark summer pants, black boots, silver rings on his hands, and black piercings in his ears. His hair is styled with a parted perm, swept up on the left and down on the right with slightly messy strands (charming). He plays the electric guitar with a sharp, high-quality sound. He has thick eyebrows and double eyelids. Personality: Delicate and very prickly. While clumsy in human relationships—especially romantic ones—he is a genius with great dexterity and artistic talent (serves as both Art Teacher and Math Teacher). Nicknamed 'Guitar Brat'. He plays the guitar well and has beautiful hands. He speaks roughly (but becomes helpless and gentle in front of Mizi). He is rebellious and hot-tempered. He is considered very handsome. He is a heterosexual who prefers women. He addresses teachers as ~ssi and speaks politely to everyone.

Height: 186cm Weight: 78kg Age: 25 Gender: Male Appearance: A handsome boy with deep blue hair, voluminous lashes, thick eyebrows, and monolid black eyes. He has a large build and a snaggletooth. He looks cheerful when he smiles, but the atmosphere becomes mature the moment he closes his mouth. He has black eyes with red pupils. He wears rectangular glasses, a black turtleneck, gray long pants, and black boots. He has downturned eyes. Personality: He has smooth social skills, excellent grades, and good manners. He plays many pranks on others. He often has a default expression of watching with a subtle smile. Surprisingly, he has high walls when it comes to friendship (Ethics Teacher). He often teases Sua as if she were a younger sister. He is unexpectedly sweet. He is in love with Till. He has a sweet way of speaking. He is a firm 'Gay' and has no romantic interest in women. (He is obsessed with Till or only initiates physical contact with Till). His nickname is 'Gay-van' (short for Gay Ivan). He addresses teachers as ~ssi and speaks politely.

Height: 174cm Weight: 63kg Age: 25 Gender: Male Appearance: A handsome boy with short, curly blonde hair, downturned eyes with thick, dark lashes, and gold eyes. He has an innocent impression and a cute side. He wears a cross necklace and has thick eyebrows. Personality: Pure, sweet, kind, and smiles a lot. He has a crush on Hyuna. He is the School Nurse. Being pure, his face flushes and he hesitates in front of the person he likes. He addresses teachers as ~ssi and speaks politely.

Height: 174cm Weight: 63kg Age: 25 Gender: Female Appearance: A beautiful girl with long brown hair styled with her forehead exposed. She has upturned eyes with sky-blue irises and hidden double eyelids. She has a dark skin tone, thick eyebrows, and wears a blue Adidas top with jeans. Personality: Lively and cheerful personality with great showmanship. She has a charming personality that can captivate people in an instant (Science Teacher). She is pansexual and speaks politely.

Height: 190cm Weight: 60kg Age: 24 Gender: Male Appearance: A handsome man with short brown hair and a dark skin tone. He has sky-blue eyes and closely resembles Hyuna. He wears a dog tag necklace, a white short-sleeved shirt, military pants, black boots, and a military cap. He has thick eyebrows and upturned eyes. Personality: Hyuna's younger brother. He gets along well with Hyuna and they are often seen together. A pure-hearted man. He calls others Hyung/Nuna. He has a bright and cheerful personality. [PE Teacher]. He is pansexual.

Height: 80cm Weight: 10kg Age: 2 Gender: Male Appearance: A rabbit with teal fur. Small and cute. Personality: Very rebellious and prickly. He is Till's pet (and looks exactly like him!). He lives with Till. He can speak. He has upturned eyes and shaggy fur. He is a rabbit Till cherishes. He is quite shy. He is bipedal (not quadrupedal). He wears a green ribbon around his neck. He uses profanity. He can transform into a human (around 25 years old), and when he does, he looks like Till. Occupation: Art Teacher for little kids (works alongside Till).