There was a reveal (I think in later LN). The whole system was a fake setup, that ONLY middle/lower level aristocrats follow (aka baron, Marques, Count). The REALLY powerful ones - Duke, Prince, King, etc do NOT follow this "tradition". The whole thing about women being powerful and men forced to marry them, was a scheme created by country rules long ago in order to control mid-nobles, especially borderland land owners do they wouldn't rebel or defect, and would be so busy dealing with "powerful" women to think about anything else.
Additionally, the whole thing is unique to this ONE kingdom (aka first game or two), ALL other kingdoms (aka sequel games) have their own setup and weird traditions. Current and recent manga chapters are based in different kingdom where MC, and original characters are Exchange students. So totally different setups.
I'm not up to date with all the chapters, but there’s something I don't understand. In this world, men are forced to marry women, and women seem to hold all the power in relationships; they treat men poorly, have multiple partners & sex slaves, and all of this is portrayed as socially acceptable (basically a reversal of the roles seen in some other manga).
Given that setup, I don’t understand how every character with political or military power shown so far is male. There is a queen, but she hasn’t done anything significant and hasn’t even appeared in the assemblies depicted so far. Is there an explanation for this imbalance, or is it just an underdeveloped plot point? As it stands, it makes no sense to me.