This is, honestly, one of the best H-mangas I've read. I've read it a few times over as well. The stories are great, but it's the artwork that is really amazing.
I can't really review it any better than this without spoilers. But for the most part, half the book is about elder women taking advantage of younger men. But eventually get the tables turned on them.
And the other half is pretty much just great sex. Incest stories. And amazing fapping material.
Happy reading!