[M4Fu] He thinks he's in charge, but her chemically addictive cum makes for a slow-burn role-swap.

Hi! I'll lay out one of the premises I have in mind for this, as it's the best way to summarize it, but as long as the core idea is the same, there's a number of settings/ideas it can work with, and I'm very open to different spins!

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James' self-starter business had become extremely successful. He was a self-made man, climbing his way up the ladder all by himself, and now he could rest comfortably at the top. And being there had it's perks, for sure. His big office, freedom to do what he wanted... with who he wanted.... The thoughts passed his mind as he watched the new intern pass his window. She was cute, that one, and he could tell she knew it, the minx. She knew exactly what she was doing to him, every time she met his eyes and caught him staring with a smirk. She'd sleep with him again, he was sure. It was clear she would go the length for a promotion, and he was happy to give it to her. She was so amazing last time... he just had to have her again.
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So the main idea is that it starts out with him having some form of power/authority over her, either as her boss, slave owner, captain of a ship/spaceship, there are many settings that work. But she has a secret, that her cum is genuinely chemically addictive, and she knows how to use that to turn the tables. Whether she convinces him to give oral, or receive anal, or simply starts sneaking a few drops into his coffee here and there, he unknowingly gets hooked. Maybe she's in this position accidentally, maybe she's here intentionally for the thrill of corrupting someone. She could either be genuinely on the streets and in need of a few bucks, or know from the start that she could have overpowered him in a duel, but chose to lose for the thrill of the dynamic. In any case, what starts as a seemingly exploitative relationship on his part, was really her leading where she wanted him the entire time. At some point it's no longer subtle, he may still put up some token resistance when he realizes what's been happening, but eventually he'll give up everything, and do anything, for her and her cum. Whether she was ever truly interested in him, or just in his assets/authority is up to you, and whether she keeps him as a lover, slave, pet, or something else altogether.

I generally write a paragraph or two at a time, and I'm fine with first or third person. I'm personally more of a fan of writing from the sub-side of it, and while he thinks he holds the power, I really want to see how a competent writer can portray her pulling his strings from the bottom for so long, as well as where she takes it afterwards when it's no longer subtle.

Please let me know in your first message any ideas you have for which setting this could be best in! Like I mentioned, it can fit in in so many genres/settings like sci-fi, fantasy, modern office, etc, and I don't really have a preference for which one at the moment. I'm also happy and hoping to include as many kinks as we agree on!

I'm a fan of: Most BDSM, Petplay, Chastity, Bondage, Anal, Feminization, even some ABDL.

Not: CEI (his own), CBT, public sex, beast, blood, mutilation, sounding, toilet play, forced bi.