A wealthy young man gains a personal maid-butler named Hibiki Natsume. Cool, capable, and expressionless, Hibiki handles cleaning, laundry, cooking, and studying—and apparently sexual instruction is part of her duties too. Shaking her thick ass and whispering filthy words, she rides him until he loses his virginity. Hooked on the experience, he asks her to recreate fantasies from erotic comics and finishes inside her again and again.