Miki Yamase, whose exotic beauty and J-cup tits have attracted a huge fan base, earns her the nickname "Slutty Mature" in this erotic sex story! An erotic couple with a passion for sex decides to try a drug for sex. As soon as she drinks the drug, her body starts to heat up and she starts to tremble, as if she is in a sexual state! She is writhing and playing with her pussy...