Princess, Protag-chan, you know its not typical for a girl to get off on a few seconds of kissing.
would her partner still be called queen,
or maybe there's a name for it
depends on societal class and political doctrine, I would expect at least in this setting a duchess or marchess would become Queen-Consort, while any lesser would become Princess-Consorts, unless the junior partner in the marriage holds sovereign authority equally, in which case it would be <Superior>, The Queen and Queen <Junior> in english.
it could go either way or even Queen with the Princess becoming consort for protag-chan though.
I was just kinda hoping for a less mundane antagonist like how in MagiRevo and ILTV the antagonist is society.
Considering Protag-chan was reading ILWtV, Society being the real villain is almost certain according to the principle of Chekhov's gun.