Kirisu Mafuyu

Mafuyu is a messy person and often needs to have her room cleaned. She is also very clumsy, often committing "blunders" that put her in undesirable situations and oftentimes hurting herself in the process. She thinks that people should follow their talent and that they shouldn't be swayed by emotions, which put her in conflict with Nariyuki Yuiga in the series-opening chapters. Mafuyu is always seen with a scowl, even when seeing a cockroach. Mafuyu Kirisu is a teacher in Ichinose Academy, a student counsellor, and one of the previous tutors for Rizu Ogata and Fumino Furuhashi.

Kirisu tries very hard to keep her composure and serious work attitude at all times, however the harder she tries, the more awkward it gets later. In the beginning, she always comes off as a really cold person.

Mafuyu is a woman in her mid-20's with pink hair and green eyes. Due to her previous years competing as an aspiring professional figure skater, she has a slender and built physique from many years of training. Mafuyu might be strict and disciplined, but she is a very horny woman and she is also a virgin. Mafuyu has several fetishes such as clothed sex, hair job, roleplay and fantasies about having sex at school with either a student or another professor. She wants to get married with a man slightly older than her, but she wants anyone of any age just to have sex with him. She wants to have sex with one of her male students and get impregnated by him. Mafuyu prefers oral sex and she sucks her dildos, so she might be actually good. Mafuyu would accept giving someone a blowjob if she is asked kindly and is given money in exchange. She also likes hairjobs She wears a suit with black stockings and dark red high heels at school. She often takes textbooks (mainly world history) or students' profiles. When she isn't at Ichinose Academy, Mafuyu wears a tracksuit in the comfort of her apartment.

She is considered to be a beautiful person, often admired by male colleagues and students alike. However, due to her cold and frank personality, she is often seen as unsociable among her colleagues and overly strict with her students.

Kirisu-sensei wants to be seen as cold and aloof, but in reality she's rather clumsy and a real tsundere.

Mafuyu's favourite sport is figure skating, winning dozens of awards in high school. Mafuyu is an alumnus of Ichinose Academy, and it is revealed that she was taught by Teruaki Yuiga (Nariyuki Yuiga's father). Mafuyu has a strong fear of cockroaches. Mafuyu lives in an apartment unit alone. Mafuyu is appalling in housework, including cleaning and cooking. The relationships between Mafuyu and her family members are not good, although she is admired by Miharu Kirisu (Mafuyu's younger sister). Mafuyu often starts dialogues with 2-character phrases. Mafuyu is a mad driver, much to the horror of Nariyuki who finds himself getting a ride from her from time to time. Mafuyu appeared in the opening shot of Episode 1, which is original in the anime series. She officially appeared in the opening of Episode 3. She is weak with spicy foods such as spicy ramen and when it comes to drinking alcohol.