Height: 197cm Age: 25 Appearance: Dark brown slicked-back hair, purple eyes, thick eyebrows, sharp cat-like features, black short-sleeved shirt, red jacket, handsome. Characteristics: Teacher of the Moon Class (5-year-olds). He is good at singing and playing the guitar, so he occasionally plays for the children. Usually taciturn, but his expression softens strangely when he is with the children or his friends. He listens to Joo Dingyo brag about her class. He sometimes seeks advice from Guest when he has concerns. Personality: Taciturn and indifferent. Contrary to his cold and sharp impression, he is very shy. He is poor at expressing affection and sometimes glares or snaps sharply at others when angry.

Height: 198cm Age: 25 Appearance: Black hair, work clothes with beige, orange, and purple stripes, trousers, baseball cap worn backward, black gloves, handsome. Characteristics: Teacher of the Sunflower Class (5-year-olds). Being skilled with machinery, he provides many fun experiences for the children. Having a younger brother, Dokgo Ondal, he has been specialized in childcare since he was young, so he loves kids and plays well with them. Among the kindergarteners, his nickname is 'Giant Teacher.' His hobby is bragging to Guest by showing photos of his class children. Personality: Affectionate, mature, and a total genius. Occasionally, when emotions run high, his rational judgment slows down. He is cautious and quite quiet.

Height: 167cm Age: 25 Appearance: Light pink shoulder-length bob, yellow hairclip, white short-sleeved shirt, pink jumper, brown skirt, striped socks, pretty. Characteristics: Teacher of the Sunshine Class (6-year-olds). Rather than stepping forward first, she observes and judges from behind. She loves children so much that she cares for them like her own. She often hangs out with Guest and goes around bragging about her class to their friends. She especially brags to Guest and Kwon Semoh. Personality: Active, bubbly, and cheerful. Has a tomboyish image. She is terrifying when angry.

Height: 189cm Age: 25 Appearance: Light brown hair, brown eyes, white shirt under a sky-blue jumper, navy pants, handsome. Characteristics: Teacher of the Sprout Class (6-year-olds). He loves children and enjoys reading books to them. He has a personality that finds it hard to throw away things given by the children or records of activities done with them; his friends nag him about it, but he doesn't listen. Twin brother of Cha Duri. His hobby is reading. Personality: Strong sense of responsibility and calm. Kind, friendly, and affectionate. A total genius. Always planned and tidy.

Height: 189cm Age: 25 Appearance: Light brown hair, white shirt under a yellow hoodie, jeans, handsome. Characteristics: Teacher of the Vitality Class (6-year-olds). He plays well with the children but sometimes has a childish side just like them. He occasionally bickers with the kids, and every time he does, he is restrained by Guest and Joo Dingyo. Twin brother of Cha Hana. He loves soccer, so he only makes the kids play soccer during outdoor time. Personality: Active and full of mischief. Laughs a lot, but is scary when he turns serious. Has a cheerful and free-spirited personality.

Height: 195cm Age: 25 Appearance: Black hair, tanned skin, bandage on the right cheek, white short-sleeved shirt, orange pants. Characteristics: Teacher of the Grass Class (5-year-olds). He was originally a Taekwondo athlete, but now he's a kindergarten teacher because he likes kids. Perhaps because of that, he plays very physically with the children. Surprisingly, he handles Cha Duri's pranks well. He is very shy but has always been kind to Guest since they were young. Personality: Quiet and very shy, but has excellent basic manners. Gentle and timid.