What is Human Enhancement manga?
The enhancement of humans can take various forms: It can be something comparatively non-intrusive as a power-up drug, a form of machine implantation or cyberization ("SAC Solid State Society"), or outright - possibly atrocious - genetic manipulation ("Ao no 6-gou"). Plot-wise enhanced protagonists in anime usually have to pay a price for their enhancements, be it physical or mental.