Something I read along time ago.

[ImaginarySlave]

It's like a group of friends go to the house to get out of rain or something. There is like four of them. The lady there knocks them out. She turns one into a pony, another into a rubber maid doll, and I dont remember what happened to the 3rd. Then the 4th which is the main character girl becomes her main slave. I remeber there being many chapters. Later in the story a cop comes in as a spy tries to save the girl but the girl ends up not wanting to go. Then mistress kidnaps the cop and turns her into something and sells her.

Can not remember to much and can not remember the name.