The artwork in Katte ni Kaizou is very interesting. While the series has very, er, crude humor and a lot of strange characters, the art style is not ugly or grotesque. Instead it is at times very cimplistic, like in the actual manga panels, yet there will be very detailed opening chapter images and tankoubon covers. Kumeta-sensei likes to outline shadows and textures. The girls in the series often wear very cute outfits consisting of many layers of shirts and skirts with different pattersn and fringe on them. The "weird" characters are sort of cute too...

Here is a selection of images from the series. Hopefully you will get an idea of what I mean!