After being caught sniffing her underwear by her carnivorous stepsister, DANDY-942 is subjected to face-riding wherever she goes.

An unassuming older brother and an arrogant younger sister, the sister seemingly a lecherous girl. One day, the brother inadvertently smelled the scent of his sister's underwear that had fallen on the floor, which she discovered. Although disgusted, the sister playfully face-mounted her brother, eventually reaching orgasm as he licked her genitals. Overwhelmed by feelings of regret and pleasure, the sister began to crave her brother...