Here's one manga series that I thought would be at least worth checking.

Also, this is one of Koji Kumeta's previous works (and the last at Shonen Sunday before Sayonara Zetsubou Sensei at Weekly Shonen Magazine):

Katteni Kaizo

Summmary:

The story follows the crazy misadventures of Kaizo Katsu, a former child prodigy turned weirdo after his female childhood friend, Umi, kicked him off a jungle gym in the playground, and he got a huge bump in the head.

With this set up, Kaizo (believes he is a cyborg) and his classmates, Umi (will go revealing her dark side with every chapter), Suzu, and Chitan(an inferior being?), will treat in every chapter a different topic of life with the hilarious and interesting way of thinking of the author Kumeta. The attacks of different geniuses/weirdos will create a lot of funny situations.

Links: http://www.mangaupdates.com/series.html?id=5988