This has a novel? Can anyone give me a premise?

Basically it's about MC trying to save his nation's doom fate by "manipulating" ML to become a good king of his enemy's nation. The prologue gives you serious vibe at first, but MC and ML will co-habitate later and it's gonna be funny as hell but then slowly they will develop feeling for each other, more like because no one in this world COULD HANDLE MC PERSONALITIES as fine as ML. So I said "manipulating" because MC unconsciously/consciously kinda "trained" ML to be his ideal husband (or dog..?)

Thank you!