Kohinata Tsukasa

A famous hypnotist who decides to return into Japan in order to look after his dead best friend's (who was also a hypnotist) daughter, Kotoha. He manipulates his way into the all-girls' school she attends and manages to become her homeroom teacher as well, before finding out that she uses her hypnotism skills to do whatever she wants at school.

The hypnosis skill he is good at is "release", in which he brings out a person's deepest and most honest feelings out; he uses this to bring out the heroines' feelings and curiosity and fear about sex, and turns into it humiliation and pleasure.