The secret boss has taken the heroine! (MxF, looking for a Heroine)

Let's get straight to the plot!

Your character isn't just some random heroine. No. She is THE heroine. From humble beginnings and local problem-solving, to having gathered allies and getting thrust into a bigger story. All culminating in her party holding off powerful demons generals, so she was the one to face the demon king one on one. And in the end? She won, crushing the morale of the invading demons, and restored peace.

Now back in the royal capital, festivities, a glorious welcome, and a generous amount of money getting handed over to the party. Enough to start a new life and finance dreams. But the king asked for a private audience with your character.
Later, he would tell her that there is one powerful figure left. Someone who holds the world at his fingertips, both financially, and in terms of raw strength. Just a few years ago, that person subtly destroyed a country. She might be the only one who can defeat him and give back true freedom to the people.

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And the way I want that to play out is that the secret boss, this oh so mysterious figure, defeats the heroine and takes her captive. How he would be able to do that in the first place? It's because she might be the current heroine, but he is the first.

And one thing ahead: "Will there be rape?"
-Nope. The character I have in mind can have moments that show a superiority complex and arrogance, but not outright evil. If your character keeps refusing advances, he won't force his way. But there will be collars and a leash, numerous attempts to get her into the mood, luxurious temptations, and sex toys. Oh but if you are not into one or another, let me know. None of these are a must.

As for the character I wanna play:

As for where I wanna take the story: I want him to take her to his home first, here we plot out what immediately happens, and then use her as a promoter for his medicine. Also, visit some places she and her parties saved, check if there is more help needed, or if they might have even made a mistake. Sex, profits, and travels.

As for what kind of partner I want, I don't wanna be picky. Try your idea, and let's see what happens. I only ask that she would be a reasonable "hero". Someone to look up to, likes people. That sort of thing. Any other details, I will gladly chat about.

And of course, if any questions are still open, feel free to ask either here or directly through a PM. I have no preference there and will reply ASAP.

Anyone interested?