Hibiki Otsuki is a courageous female teacher who is willing to have sex with strangers to protect her students.
In 1943, when World War II was raging, Hibiki Otsuki was sent to the mountains to teach. Unfortunately, nearby is the Japanese army station. Two of her students were taken to the room by a soldier to have sex, and in order to save the students, Hibiki Otsuki said that she would have sex with him instead of the student. He made her take off her clothes right in front of his students. That evening he spoke to the commander and the next morning the soldier came to get the teacher to see him. He forced her to have sex, and there was no way to resist, so Hibiki Otsuki reluctantly did as he pleased. The next day, the soldier arrested her again and this time she had to have sex with two men at the same time. Then day after day, Hibiki Otsuki was constantly taken to work as a sex puppet. One night, on his way home when he had just had to serve the soldier's guest, Hibiki Otsuki was tired when he was stopped by two army cooks and demanded rape. Unable to do anything, Hibiki Otsuki once again had to have sex with two men at the same time.