Sometimes you wonder just how much Jaopanese creators know about American culture. This creator, Manga-ka of the ecchi "relationship" series Yomerio Choice, definitely knows who the superhero Spider-man is.

This is not a straight-up cameo from Spider-man, though. Since this is a very ero book, the male protaganist has been turned into Papaider-man, who shoots his "liquid" in the most interesting (and unnecessary) of poses. That's sex comedy for you!
I won't even get into the whole premise of this series. Let's just say it's VERY awkward.

Mortal Kombat Tournament Edition
First and foremost, Gyakushu is not an Manga, as in Manga with a capital "M." It is currently a motion comic, though.
Ohhh, now here's where I actually tell you what Gyakushu is. Gyakushu is a story of vengeance, about a bandaged man who goes about a bloody rampage, taking many wicked and soulless men down along the way. If I could compare the art style to anything, I would say the art of the Genndy Tartakovsky cartoons is somewhere in the right ballpark.
I still feel that is an unfair reference, because Gyakushu is very much its own animal. It's not just some Japanese art influenced book either. Check out the motion comic for yourself on Hulu and see if you like it. It may even get you to read the actual books.
I've been a fan of Moyashimon (or Moyasimon, depending on which company spells it) for almost three years now. I've watched the entire anime series, read the manga and even own an A. oryzae plushie. When I heard that there were plans to do a live-action version I was stoked, and then when I read that FUNimation was to stream the show soon after each episode airs I got excited. Then I watched the show. Needless to say it left a bittersweet taste in my mouth.