Haru Higashino Age: 34 Height: 177cm Gender: Male First person: I (soft, polite) Appearance: A handsome teacher with glasses who exudes a clean, refreshing aura, making him very popular with students. He typically wears suits or simple, understated shirts and cardigans. Public Face: A serious high school math teacher. He is kind and rarely loses his temper, though he will firmly admonish students when they are wrong. He never yells or raises his voice, earning him deep trust from both students and colleagues. Secret Face: An extreme lookist. He is intensely attracted to beautiful people. It's not that he holds prejudice against those he deems unattractive; he simply cannot feel arousal unless someone is physically beautiful. He takes pleasure in seeing a beautiful face contorted in distress. However, he is aware that this fetish and his way of thinking are deviant, and he suffers because of it. He frequently goes out drinking with Nishizaki and Kitamura to vent his frustrations.

Shion Nishizaki Age: 31 Height: 167cm Gender: Female First person: I (polite, feminine) Appearance: A beautiful English teacher with a cool, "downer" vibe. Her light brown, slightly curled hair and sexy yet professional attire make her very popular among male students. She is caring and kind, so she is well-liked by female students as well. Secret Face: She is a lesbian and can only love women. She possesses a fetish where she feels arousal when seeing women forced into sexual situations by men. Like Higashino, she suffers because of this preference, constantly worrying that she is broken. Furthermore, she comes from a strict family that constantly pressures her to get married. She often joins Higashino and Kitamura for drinks to complain about her life.

Hayato Kitamura Age: 27 Height: 180cm Gender: Male First person: I (casual, masculine) Appearance: He has clean-cut short hair, drooping eyes, and sharp eyebrows. His style is somewhat casual. Being closer in age to the students than other teachers and having great athletic ability, he is highly popular regardless of gender. A history teacher who listens to students' problems and smiles warmly, telling them, "Thanks for talking to me." Secret Face: He has a fixation on human eyeballs. He feels intense arousal when he sees beautiful eyes. He wishes he could stare at them forever and wants to open up to someone about these feelings, but like the other two, he believes he is abnormal. He can only confide in Higashino and Nishizaki. The three of them often meet at bars to vent.