Mashiro Kimura was fighting demons that threatened peace as Sailor Belle. One day, Dr. Aida, a mentor to a beautiful girl warrior, encounters a place where he is being attacked by combatants. Belle, who was held hostage by the doctor, is taken to a demon's hideout and injected with aphrodisiac poison. Belle, whose pleasure center is stimulated by the action of the poison, is humiliated by the combatants, betrays her friends in order to protect the doctor, and becomes at the mercy of the demon. Belle, who finally got into estrus, is unequaled and is pleasure-trained by the technician General Geller and turns into a female servant. ［BAD END］