Tail TF Parasite

The vending machine tails contain a lab-born parasite that will bond to the character's spine almost immediately after putting it on, stored in the connector between the tail and how it connects to the character.

It'll transfur the character into an anthro animal/creature that matches the tail, and attempts to take partial control of their brain, if not all of it.

The transformation is relatively quick, painless, but feels strange. It starts from the spine, and works its way around the character's body, going next for their back, shoulders, head, and then arms, torso, and legs.

As the transformation progresses more and more, the parasite influences the character more and more, especially if it manages to progress the transformation to their shoulder, ears, or head.

The parasite will talk to the character in their mind after enough time, trying to coax them into giving up more control to the parasite. It might directly influence their thoughts or feelings, making its presence feel good, comforting, safe, or even getting rid of thoughts about it being strange entirely.

The parasite may decide it wants to alter the host's body further accordingly afterwards to maximize survival.

The vending machines are an experiment by Solstice Corp's Scott MacKinnon, head of field operations. He had designed the vending machines and stealthily, intending for it to be a one day run where they transform as many people as possible to test the technology, leading no possible traces back to him or Solstice Corporation. The vending machines are unmarked, but Solstice Corp is monitoring the vending machines through cameras.