Nageki no Kenkou Yuuryouji

Beneath her exterior as a perfectly healthy and ordinary young woman, Hiroe Ogawa harbors an extraordinary and deeply private dilemma: she is fundamentally unable to reach sexual climax under any circumstances. Despite her persistent objections and desire for privacy, her older sister, Mayaka, and their mother, Yayoi, take it upon themselves to intervene in her personal life. Driven by a relentless desire to help Hiroe achieve her elusive goal, the well-meaning yet overbearing family members subject her to a variety of unconventional methods. As the narrative unfolds, Mayaka and Yayoi deploy an array of sexual techniques, specialized appendages, and even hypnosis, transforming their household into a bizarre arena of intimate experimentation directed entirely at resolving Hiroe's condition.