Kyoko and her husband live with her husband's father, Tetsuo, and her father-in-law, who had lost his wife, was very envious of his son and son-in-law's happiness. His father-in-law was secretly aroused by her voluptuous body. At that time, her husband was away on a business trip and had to leave the house for a while. When Kyoko and her father-in-law were left alone, he could no longer hold back and attacked her...