I'm pretty sure it's going to be hard to convince a university to give you a Master's in history when you tell them about the Celt invasion of the USA of 1783. Or the French outbreak of dragons in 1431.
Aoi is the most skilled at the deadly arts of seduction? I wouldn't have called that. That's what makes her so dangerous, I guess. Really putting the fatale in femme fatale.
I feel the MC got short changed. He asked for a 50/50 ratio of males and females slaves, he didn't get it. He asked for at least teenage labor slaves, but it looks like he got a lot of children.
I'm not sure what Klaus' logic is in making Wendelin and his harem work as lowly storeclerks for commoners. (Provide the goods, yeah, sure, I get it. But someone else should be selling them while they sip tea with their pinkies in the air or whatever.)