![](https://pic1.mangapicgallery.com/r/avatar/0f/u1552321_50x50.jpg?2)
Unfortunately, that is today's era of mindset. You have to look at it through the point of view of the people in this sort of time period. It doesn't matter if it what I said doesn't cancel out age appropriate, you nor I have no say what they did before we were born.
It's the same as marrying blood related families to each other, it was extremely common between royals and nobles in this sort of time until they saw the error of doing that.
ml is literally the only age appropriate love interest