Takashi, a virgin, hears from a friend that women also have libido and masturbate, and out of curiosity, he makes his sister Minori drink a large amount of aphrodisiacs. At first, she succeeds in seeing her masturbate in heat as she planned, but her medicine is too effective and she loses herself. . After that, until her medicine ran out, her parents went out to her home where she had no escape. I was able to...
