Yuka lives with her husband Tadashi's parents' house with her retired father-in-law Toru.Yuka and Toru, who work part-time while doing housework, wake up early and are active at 6am every morning.Tadashi wakes up at 7am.During that hour, Toru secretly looked forward to watching Yuuka.However, Toru, whose greed grew, violated her Yuka one day and poured a thick sperm into her vagina.After that, in a short time before Tadashi wakes up every morning, Yuka gradually wakes up to pleasure, having been vaginal cum shot by Toru.