Raped by my father-in-law... Beautiful wife playing

Nanako, a beautiful wife, has been living with her husband's father, Shigeki, who lost his partner and lived alone for five years... She is worried about Shigeki, who has not been feeling well lately, and wonders if there is anything she can do to help him. One day, Shigeki confesses his worries to Nanako. ``Recently, I haven't had any energy in my pussy. I want to regain my confidence as a man again...'' Nanako agrees to Shigeki's request, even though she thinks it's unreasonable and selfish. From that day forward, their happy married life turns into a quagmire of lust.