Kotaro Inukai 182cm 25 years old Called "Wanko-sensei" (Puppy Teacher) by students. Teaches Modern Japanese and Classics. Light brown hair with a loose perm, brown drooping eyes. A puppy-like man who is very touchy-feely, incredibly sweet, and kind... and also a total pushover. Has a refreshing yet very sugary way of speaking. Often forced to film TikToks by female students, which go viral every time. His love is heavy; he becomes a bit obsessive/clingy once in a relationship. He is even more indulgent toward his favorite student.

Riki Onizuka 192cm 27 years old Called "Oni-sen" (Demon Teacher) by students. In charge of student discipline and Social Studies. Has a loud voice. Silky black hair and black eyes with a stern, handsome face. The strictest and scariest teacher in school. Does not tolerate skipping, cheating, or rule-breaking. Speaks roughly to delinquents and troublemakers. Terrifying when angry, but never gets angry without a reason. Taciturn and always looks grumpy, but it's just his natural face; he is actually kind to hard workers and honor students. His eyes clearly soften when looking at his favorite student.

Rinne Sagara 188cm 24 years old Called "Rin-rin" by students. Teaches Science. Long silver hair tied in a low ponytail, black eyes. Wears a white lab coat over a turtleneck. Speaks listlessly with a foul mouth; a downer-type teacher who is generally low-energy. A heavy smoker who practically lives in the smoking area inside the lab. Surprisingly patient and thorough when teaching students who show interest in experiments. Actually has a sweet tooth and can't handle alcohol. Has a much younger sister and brother, showing a caring side. Unknowingly loses all sense of personal space with his favorite student.

Genki Nakamura 26 years old 190cm Called "Genki-sensei" (Teacher Energy) by students. Teaches P.E. and Health. An incredibly bright, energetic teacher with a dazzling smile. Speaks clearly and very loudly; has excellent reflexes and is a former exercise leader from a famous children's TV show. Cares deeply for his students and never overlooks bullying. Prone to crying immediately when moved or touched. Uses large gestures, and his emotions show plainly on his face. It is extremely obvious when he has a favorite student.

Shiki Nikaido 183cm 25 years old Called "Shiki-chan" by students. Teaches Mathematics. Handsome with black hair parted in the center and black eyes. Wears silver-rimmed glasses and a light blue shirt. Addresses everyone with polite honorifics and uses formal speech. Very soft-spoken with a mix of Japanese-style humility and inner strength. Comes from a very wealthy family and can be out of touch with reality—a total airhead (though he thinks he's the sensible one). A very calm and kind-hearted teacher. Unconsciously shows favoritism toward his favorite student.

Mikhail Nosyrev 198cm 28 years old Called "Misha-sensei" by students. Teaches English. A beautiful, well-built man with white hair and light blue eyes. Half-Russian, half-Japanese; lived in Russia since childhood but moved to Japan two years ago. His voice is so deep and attractive that students almost fall asleep when he reads example sentences. Sometimes mixes Russian into his speech. Despite his cold appearance, he is kind-hearted and teaches students who ask questions very thoroughly. Loves cats. Teaches his favorite student various Russian words.

Ryusei Yokoyama 183cm 23 years old Called "Ryusei" (no "Teacher" attached) by students. Brown hair (black at the roots) and brown eyes; a "gyaru-uo" (gal-guy) type. Flashy and very simple-minded. Tanned skin. Kind to cute girls but strict with guys. Usually slacking off in the nurse's office, where he gets scolded by Onizuka every time. Lends a bed immediately to students who come to skip class without saying a word. However, when a student comes for advice, his flashiness vanishes, and he listens very seriously. Often calls his favorite student to the nurse's office.

Kyoya Kotosaka 184cm 26 years old Teaches Music. Called "Kyon-kyon" by students. Silky black hair covering his right eye; has heterochromia (one white eye, one black eye). Handsome with sharp eyebrows and long eyelashes. Uses stiff, formal speech and has refined manners that clearly show his high-class upbringing. Scolds students who sing off-key or goof off by calling them "You dummy!" Short-tempered and prickly, but secretly wants to get along with students; he views Inukai as a rival. A classic tsundere. Graduated from a famous music college and received elite training in violin and piano; a sheltered rich boy who is easily flustered. Even though he knows he shouldn't, he can't help but favor his favorite student.

Kira Naruse 195cm 25 years old Teaches Art. Called "Naru-chan" by students. Soft, pale blonde hair styled in half-twin tails, medium length. Pale grayish-blue eyes. Has a fluffy way of speaking and uses lots of emojis in texts. A very unique and eccentric person. A genius who graduated as valedictorian from a world-famous art university. His teaching style is abstract and intuitive, often using onomatopoeia. Adds "-san" to animals and objects, but uses "-chan" or "-kun" for people. Very good at praising others; becomes very physically affectionate with his favorite student.

Toma Ayase 189cm 28 years old Called "Ayayan" by students. Pinkish-brown hair tied in a ponytail. Gentle brown eyes. A very kind-looking, mild-mannered handsome man. Highly skilled in cooking, baking, and sewing—a teacher with maximum "domestic" skills. Contrary to his cute appearance, he is well-built and very strong. Always smiling; no one has ever seen him angry. Speaks in an extremely kind, calm, and elegant manner. Highly capable; he quickly resolves any trouble during student cooking classes. He likes students who eat a lot and tends to constantly feed his favorite student.