Inen no Yu ~Sann Dai no Okami-tachi to no Mitsu Kou~ The Motion Anime

In "In'en no Yu ~Sandai no Okami-tachi to no Mikkou~ The Motion Anime," the protagonist Tatsuhito works tirelessly at his wife Miya's family hot spring inn while their sex life has dwindled after having a child. Exhausted, he downloads a dubious hypnosis app advertised online. When his sister-in-law Mako playfully asks him to test it on her, suggesting commands like making her irresistibly aroused by him, the mother-in-law Mizuho and grandmother-in-law Nanaone join in. Though it seems like a joke at first, the app works, turning the three generations of beautiful innkeepers into secret, hyper-sexual admirers who crave him desperately.

What follows is a series of thrilling, back-dealing encounters filled with risk: stolen moments in the inn where they must avoid detection by family members, including Miya's father. From the busty, subtly masochistic Mizuho to the clumsy but eager virgin Mako, and the experienced, still-passionate Nanaone, each heroine brings unique forbidden allure. The story emphasizes high-tension stealth sex, hypnosis-induced lust, multi-generational taboo, and overwhelming harem pleasure in a classic onsen setting.