https://www.mangago.zone/read-manga/i_tamed_a_tyrant_and_ran_away/
I'll confess I haven't finished this one yet, but it was the first thing that sprang to mind.
wait but i think in this one he's more powerful-- he's the king and she's a tutor that he's chasing down
True enough, but the power dynamic of the relationship is mostly in her favor I would say.
Minor character development spoiler below:
Especially when you get into the later chapters (I'm at 90) it's clear that his mental state is very much dependent on her.
Romance where the female lead is the one who's stronger? like dominant/stronger, higher in power, rich etc. as long as the female lead has the upper hand in the relationship. Thanks!