Highly recommend all to read esp if you are into mpreg. Definitely one of the very best. You can read the rest where the manga stop from this website https://www.brittanypage43.com/tag/dear-benjamin/ towards the last few paragraphs of Chapter 10
The summary and comments are not accurate. This is a good story with proper ending. Nothing is confusing at all. Story is focus on uke pov while seme pov is only revealed in the last few chapters.
You're actually right I don't know why you got so much downvotes ; there's a bit of a lull in the middle of the story that almost got too boring for me but the explanation at the end makes total sense (you have to read a bit in between the lines but it's not too hard to understand) and it doesn't even feel rushed for once, it was kind of the perfect finish (tho it's true there are some things left open like how is it possible for the heir to the throne to marry a beta without the aristocrats making a fuss)
Excellent characters development, storyline, plot and most importantly, good ending. But prepare lots of tissues. Very touching story that will definitely make you cry.
I finished it within 24hrs without sleep cos I just cannot stop reading. Need to catch my sleep now.