Her husband, who runs a company, is on a three-week business trip overseas. Having already given up on having children and having been sexless for 10 years, Ururu has a lot of free time on her hands. One day, her husband's subordinate, Miyashita, appears before her. "Ururu-san, there's something I want to tell you..." But just a few minutes later, Miyashita rapes her and cums inside her. It's her first sex in 10 years, and she feels the hot pulsation of sperm in her uterus. Ururu's desire to get pregnant is ignited, and from that day onwards, she begins a 20-day continuous creampie life, inevitably resulting in her impregnation...