Raising a Giant Snake in the Beast World

Zhou Nuo is an avid wilderness survival enthusiast. She and five online friends from all over the country form a team to explore a rainforest, only to accidentally lose their way in an ancient continent.

This is a primitive society ruled by beastfolk. When Zhou Nuo and her five companions transmigrated here, they accidentally wrecked the crude tree hollow built by Yaqi, a grudge-holding rainbow python. The python coils her iridescent-scaled tail around them and trades them to other beastfolk for food.

Her five teammates become slaves to different beastfolk. Zhou Nuo, however, is kept as Yaqi's slave after offering to help her rebuild a larger, prettier tree hollow.

While diligently serving the rainbow python Yaqi as her slave, Zhou Nuo does her best to survive in the primordial rainforest.

She catches prey for Yaqi, prepares her bathwater, and scrubs the scales on her body. Zhou Nuo gets better and better at her work, and occasionally acts as a mediator when her teammates and other beastfolk have disputes over their living arrangements.

The tenth time the spider Doli comes to Yaqi's beautiful wooden house to complain about her slave and demand after-sales service, Yaqi takes on a half-human, half-beast form. Her long tail coils around the wooden rack Zhou Nuo uses for drying things. Following Zhou Nuo's example of mediating disputes between beastfolk and slaves, she asks Doli what she wants to do.

Doli points at Zhou Nuo, who has just returned from outside. "Trade slaves with me. I want Zhou Nuo."

Yaqi's slit pupils fix on Zhou Nuo, her perfectly suited slave, who is still holding the food she caught for her. A scarlet forked tongue slips from Yaqi's mouth. She uses her tail to throw the delusional Doli out the door, then drops from the rack into Zhou Nuo's arms.

The slick snake tail coils around Zhou Nuo's waist. Zhou Nuo thinks her "master" can't wait to eat.

Yaqi really can't wait. A slave has to do all sorts of things, after all, including making her "master" happy.

Then, in the bright light, Zhou Nuo discovers that female snakes have two...

P.S. One-on-one romance, with some author-created worldbuilding.

I read that female snakes have two of those parts, and now the snake-girl fantasy is even better.

Theme: The wonders of nature.