The creature standing on top of the evolution system isn't human, but a creature named The Majin. Majin Devil is a story about a young nerd who fights against monsters of all sorts, and eventually faces Majin, who wants to take his body. Majin Devil is a 2001 2-book manga series by Oh Great! (Ogure Ito). With that, comes Oh Great!'s infamous "story-telling" (he comes up with his own rules for defying physics, biology, etc). Some people may need Brain Bleach after reading this. This manga provides examples of: