Not exactly a hentai. Adult/explicit situations but the art style doesn't show much. A cute and informative manga about sex in a normal relationship with a real couple as an example.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
How Far Have You Gone?