The perfect hentai for you, if you are really into anal intercourse.
This series features a few stories that actually have more depth than a lot of other hentai mangas. It features things like inferiority complex, age gaps in relationships, etc. Even the author states that one of his stories was pretty dark compared to what he has seen before in this genre. That's impressive to capture while also building around sexual intercourse scenes.
The art was alright, it's not my favorite but it is good for the stories told. It's a very good manga that doesn't get boring or too into sex that
it forgets the story at large.