Hiding her pregnancy from her husband, Sumire Mihara asked her father-in-law to help her stay pregnant. (SPRD-1444)

The Mihara family lives together with their husband and father-in-law. However, the lack of children is troubling Sumire, who discusses it with her father-in-law. He doesn't offer an answer, but Sumire remembers her husband has many brothers, and her father-in-law's sperm should be very strong, so she asks him for help…