PotEO: The Fox's Reward

The The Fox's Rewardis an ending in Prisoners of the Elder One. It involves leaving through the golden doors with Tiffany rescued as a catslave, but also have traveled back inside Yuki's room through the Hand Mirror and interacted with Yuki in the basement.

Erik wakes up in his own bed again, thinking that it was all just a dream. However, not only is Tiffany still a catslave, but Yuki has also followed them back to this world. Instead of feeling angry at Erik, Yuki is elated to have found a way to escape that prison, and she agrees to grant Erik's wish of removing her control over Tiffany, though she still leaves her as a catgirl.

As for Erik, his reward for freeing Yuki, as per tradition, is her hand in marriage. After getting to know each other more intimately, Erik is now the husband of a sadistic, but more than happy to be loving, kitsune, whose insatiable lust makes up for her lack of any housewife skills. Tiffany has also recovered from her ordeal, simply pretending her cat ears as cosplay when going out in public. Not only does Erik now have to handle his new wife and mischievous sister, he also have to deal with the increasing amount of catslaves that Yuki brings home with her whenever she heads to the city.

But eventually, Erik accepts the strangeness of it all, and he, Yuki, and Tiffany live a long and happy life surrounded by catslaves.