The earth is ruled by an empire and the protagonist goes to an elite school to train to be a knight of the empire. One day, the school and the town is destroyed by the goverment on behalf of the empire. The protagonist is really angry at this and decides to plot against the government. The protagonists’ parents were killed by terrorists too so he has essentially lost everything.

A girl approaches him and asks “Do you really want power? If you do, then you can achieve 'revenge'. Just tell them what to do in order to get justice.”
The mysterious girl give the potagonist the power to manipulate people with his words.
New hair, a new face, the protagonist approaches the girls who caused him so much pain – but can he really get his “revenge”?

[From Liemyx's blog]