Nano Hazard

Nano Hazard (ナノハザード, Nanohazādo) is a Japanese manga series written by KURIHARA Shoushou and illustrated by kazaana.

Plot
Enjou Shuuto's dream was always to become a detective and take down the scumbag who killed his father. As practice, he takes on the local bullies at every opportunity... only to get his butt handed to him. But what happens when rogue nanobots descend on his neighborhood, "enhancing" their hosts with deadly results?