Azusa, his son's wife, is kind, beautiful, and hardworking, and her father-in-law, who lives with him, is constantly looking after her. Every day, the father-in-law casts lewd glances at her voluptuous, slim-waisted body, which is in the prime of womanhood. Even so, it is truly pathetic and pathetic that his son is unable to satisfy such a devoted and faithful wife in the sex life... Feeling sorry for his son's wife, the father-in-law can no longer resist and does the forbidden act...!