ch4 when Serina is explaining knight training class. the only way to train stats is acquire boyfriends.
Im articulating what Serina said on the ASSUMPTION its not a game mechanic. Presumably Serina would experience the same effects and benefits, but to a much more significant degree, when she finally kisses Almelia. I also dont see why this effect would be exclusive to mouth-to-mouth kissing, or why it cant also be performed by Blood Oath.
Im identifying where the latest it can be based on significant societal defining milestones in technology and not the general period those times are adhered to. there actually is an industrial revolution that happened before the main one that we ignore because of the much more exciting wars of colonialism and wars of royal succession that happened at the other end of the 18th century, which saw the proliferation of water wheel powered factories in both brittain and the north american colonies.
1: Barring Mr Flammel, we have literally never seen an adult in the series who isnt part of the waitstaff or a serving Guard Knight.
2: we dont know who or how Estelle got her pre-Academy Education, and everyone else has private tutors, which can put you anywhere from the dawn of human civilization until, ironically for what you claim, the end of the Napoleonic Wars and the beginning of the high industrial revolution.
3+4: dont mean anything. Few artists are going to be putting in the kind of effort to explain clothing and architecture movements in a historical sense. the clothing, at least outside of the flashbacks to Earth Serina, read to me as "Fantasy High Class with cosplay maids", while the architecture is literally indecipherable to the period since its all timberframed with stucco walls, and thats assuming theyre not painting the walls white. then you have interior sills on the windows from Versailles and the Celesbrite manor has god damn welded aluminum and glass fencing around it. In fact looking at it it looks like what architecture is there, i feel like it was designed jointly by the author and artists by emailing Sims 4 Plots to eachother.
5: you mean the structure of monarchies before the Age of Absolutism or the formation of Parliaments? where maintaining vassal's Fealty was less by government order and the threat of national arms, and instead at the behest of political favors and walking the tightrope of political moderatism? Because the Japanese Otome Princess Dating Sim trope doesnt make sense with their power dynamics and conflicts for an Absolute monarchy, Elective Monarchy, or Constitutional Monarchy. These kids arent clearly told "youre going to marry Mrs Bitch to keep the Warhawks in line, youre going to marry Mr Stick-up-his-Ass to keep the Libertarians in line, and youre going to be prime minister so you have to marry Mrs Holds-40%-of-the-National-Economy to keep the peasants in line for your brother."