"This is special training, to make your body easier to conceive..." Riku, a young wife who was worried about not being able to have children, was tempted by her father-in-law's words and ended up having a physical relationship with him. Her father-in-law's cock was so ferocious that it made her feel nostalgic for his age, and Riku was taught the pleasure that she had never felt with her husband's dick. While her husband was away, the "special training" was conducted many times, secretly, and eventually Riku began to seek it out herself, even during her risky days... *This work is an excerpt from "Young wife who gets inseminated by her father-in-law on both safe and dangerous days" (product number: h_422sero00266).