Haitoku no Kyousei Tanetsuke [v1.0] [Atelier Sakura]

Although Kotoko’s unwavering love kept her and Yuuto together, the Houshou family remained firmly opposed to their relationship, constantly pressuring them to divorce.
Their only hope of acceptance was a child.  If Kotoko could bear an heir, the Houshou family might begrudgingly approve of their marriage.  Desperate to conceive, the couple tried everything—but it was soon discovered that Yuuto’s sperm had issues, making natural conception nearly impossible.  Just as despair began to settle in, Yuuto brought Kotoko home to meet his birth family—the Ikushima household—for the first time.  Upon learning of Yuuto’s fertility struggles, his father, Isao Ikushima, hatched a dark scheme.  He proposed that Kotoko accept a sperm donation… from within their own household.  Though initially horrified and resistant, Kotoko’s love for Yuuto gave her the strength to consider it.  If it meant protecting her husband’s time and dignity, she would do whatever it took.  And so began the twisted arrangement:  A highborn lady, entangled in adulterous sex disguised as a “sperm donation” with her husband’s family—the men of the Ikushima household…