Spider World

Vanja falls through a hole in the ground, and finds herself in a world filled with overgrown spiders and spider-humanoids, who sees her as the perfect sextoy for one simple reason: she's only got female genitalia. All the female spiders in that world are futas, and are only interested in having sex with other females (except in their breeding season). This leaves a bunch of sex-starved male spiders...and when the Spider Queen finds out about Vanja's existence, she wants to capture her for her own special breeding purposes​