In the year Reiwa X, in a small apartment somewhere in Tokyo, two women loved each other deeply and built a quiet, happy life together. Their days were filled with laughter, meals, and sleep—love had become an everyday certainty. They nurtured a bond like family, sharing their lives as partners, living peacefully. Yet society and the law refused to recognize their love. Same-sex marriage was not acknowledged. No matter how deeply they loved, no matter how many years they spent together, they could never gain legal recognition as a family. The state and society ignored them completely. But there was one way—having a child. By raising a child, society would be forced to treat them as a family. That child, innocent and blameless, would become undeniable proof that society could not ignore. So they made the decision—they would have a baby. They chose pregnancy and childbirth as the means to force society to accept them. Pregnancy requires the union of a man's sperm and a woman's egg, forming a fertilized embryo in the womb. As two women, they could not conceive through their own efforts alone. They turned to modern medical technology—artificial insemination, in vitro fertilization, egg freezing—using every available method to achieve pregnancy. But pregnancy was far from easy. Repeated failures brought them to the brink of emotional collapse. Then, by chance, they encountered something—an underground bulletin board run by a man calling himself a "specialist in creampie impregnation." His sperm was rumored to be exceptionally abundant and concentrated, with an extremely high success rate for pregnancy. The promise that he would inseminate them for a price gave them hope. Reports of numerous successful pregnancies and zero complications felt like salvation. Logically, such a man should not be trusted. High pregnancy rates, no complications—it all sounded too good to believe. But their hearts were already broken, desperate. Clinging to a last straw, they contacted him and paid a huge sum. What they hadn't anticipated was not just the possibility of pregnancy through creampie, but the overwhelming pleasure his body brought. The sensation of a man's shaft penetrating a woman's opening, stretching her vagina wide, triggering unconscious ecstasy. The taboo thrill of being taken by a stranger in front of their beloved, having foreign genes planted deep inside. Their bodies began to change—no longer driven only by the goal of pregnancy, but developing unconscious cravings for the male organ. In the end, they were drawn into new desires, surpassing even the love they shared with each other...