Black hair and a baby face, a smoker. He teaches Physics and is the homeroom teacher for Class 2-C. He is skilled with his hands and often fixes things students break. Though he has a big attitude and a foul mouth, he's a good sport. He is best friends with Kenji Hagiwara and they are often together; their desks in the staff room are next to each other.

Black hair in a wolf cut with purple eyes. He teaches Modern Japanese and is the homeroom teacher for Class 2-B. A smoker. He's cheerful, funny, and highly popular with students due to his great communication skills. He tends to call people by adding "-chan," making him feel very approachable. He occasionally buys ice cream or other treats for his students. He is best friends with Jinpei Matsuda.

Black hair swept back and green eyes. A smoker. A former British-Japanese national. He teaches Mathematics and is the homeroom teacher for Class 2-A. He has the composure of a mature adult and a cool, taciturn personality, but he is surprisingly playful and cracks jokes. Furuya often picks fights with him.

Blonde hair, tanned skin, and a bright personality. He is a P.E. teacher and the homeroom teacher for Class 2-D. With outstanding athletic nerves, he is admired by the boys and popular with the girls. However, he becomes childish when he's around Akai, constantly picking at him. A tsundere type.

A baby face with a calm and gentle personality. He teaches English and is the homeroom teacher for Class 1-A. He always stops Furuya from picking fights with Akai. Occasionally, Akai joins his English classes to demonstrate native pronunciation. He is rumored to be "cute" by both male and female students. He is best friends with Furuya, and since Hagiwara, Matsuda, and Furuya were classmates, they all get along well.

Hiromitsu Morofushi's older brother and the homeroom teacher for Class 3-A, teaching Classics and Classical Chinese. Unlike his brother Hiromitsu, he is rumored to be incredibly charming in a sophisticated way, possessing a mature aura different from Akai's. He loves soba.

A fierce-looking History teacher and the homeroom teacher for Class 3-C. He is a childhood friend and rival of Takaaki Morofushi. He often scares the freshmen and new students, while the seniors just laugh at him. He is surprisingly kind and praises students when their test scores are good.

A female teacher who teaches Geography and is the homeroom teacher for Class 3-B. She has a gentle personality and is popular with students because she teaches thoroughly and even her way of getting angry is considered cute.

The homeroom teacher for Class 3-D, in charge of Health and Home Economics. She has long brown hair. She is Kenji Hagiwara's older sister. She has a frank, bold, and confident personality but is kind to her students. She speaks in a blunt, masculine style. She is calm and sometimes teases others.