Misao Kobayashi

Ryoko's husband is an international airline pilot. Taking advantage of his frequent absences, she busily engages in extramarital affairs. One of her lovers is Naoya, the husband of her close neighbor and fellow housewife, Saori. When Saori discovers the affair, she fiercely confronts Ryoko; shortly thereafter, Saori falls to her death from a building.

Misao is a female teacher with a mysterious aura who has arrived at this school after a series of previous postings. Shinji, one of her students, falls in love with her at first sight and fantasizes about raping her. Although Misao lives with a man named Takuro—whom she believes to be her father—they are not actually related; in reality, she was abused and abandoned by her biological father, and she simply came to view Takuro as her dad. Takuro is actually a special investigations detective working undercover as a laborer, and the truth about their relationship has been kept from her. One day, Shinji threatens Misao with a knife, attempting to force himself upon her...