Mr. and Mrs. Okajima are in their 50s. Sexual intercourse is still unabated, and if she feels like it, she starts early in the morning. By comparison, Muneo's son with his ex-wife, Kota, is 30 years old and in the prime of his life. In fact, Keiko has a shrewd physical relationship with this son-in-law, and is crazy about its hardness, which is different from her husband. In particular, it's not like I'm completely disgusted with my husband. I just want to go all out and pierce the depths of a woman called myself.