Fourth installment in the series. The female pheromones emanating from AIKA push Kyō's rationality to its limits. Neighbor Yuu Shinoda stands at the center of it all. Kyō dominates them through powerful hypnosis, making them starve for his cock and obsessively crave it—even in front of their boyfriends and husbands. The hypnosis lifts when his penis penetrates their vaginas, returning them to reality, but as soon as he pulls out, they fall back into the hypnotic state. Through this repeated cycle, their bizarre behaviors unfold.