Supernova

Briefly about Supernova manga:

It's the dawn of a new age - the Age of Iron. In a futuristic Japan, driven by a corrupt government, Yushin grows up as an orphan in the abusive care of a wealthy family. When his torment goes too far, he joins the dojo of the mysterious Ryoichi and learns his lethal fighting technique. Amidst warring factions and anti-government rebels, Yushin learns to fight for his destiny - to defy injustice and bring balance to the world.