Aiko lives and takes care of her father-in-law, who suffers from asthma. She doesn't know when her husband, who is away on business alone, will return. Even when her feudal father-in-law asks for her body, the timid Aiko cannot refuse and ends up being raped. One day, while Aiko's father-in-law was away, she was assaulted and raped by a wanted strongman who infiltrated her. Then, her culprit appears in front of Aiko again... Aiko, who was once timid, becomes strong as a woman, and she grows into a strong woman.