From 9 AM to 6 PM, after her husband goes to work and before he returns home… she and her father-in-law diligently engage in “making a grandson” through penetration sex. (DLDSS-486)

To support her father-in-law, who was lonely after losing his mother-in-law, Chiharu lived with her husband, Satoshi, in their hometown. Although her husband was earnest and filial, he was also a clean freak and didn't desire nighttime sex. One night, her father-in-law secretly watched Chiharu masturbate. The next day, after seeing Satoshi off to work, he revealed his heightened desire, pushed Chiharu down, and continued to greedily violate her until Satoshi returned home on time…