Accelerando Datenshi Tachi No Sasayaki 02 [portable] Guide

Assuming you are referring to the second volume of the series, here's a brief story outline:

A very specific title!

The main character, Arita Haroyuki, is a high school student who becomes involved with the Accelerated World and gains the ability to "Accelerate" his own consciousness. He becomes a Datenshi, tasked with maintaining order in the virtual world. Accelerando Datenshi Tachi No Sasayaki 02