Takabe Hiromi

A English teacher who is tough on herself and others.

Because of her strictness, she was entrusted with guiding the student's life, and always scolding anyone who violates the school rule.
She is disdainful of men and keeps her distance from her male colleagues.
Her nickname is the 'Iron Maiden' because she keeps a close on relationships between men and women, which is forbidden by school rules.

Hiromi is more wary of the protagonist then any other men, and seems to be aware that his smell is semen.