Hyper Broken ~Tamashii no Chikara~

The protagonist thought he was the strongest fighter at his school, until a new rival completely destroyed him. As if that wasn't enough, his sister was murdered, and he was left for dead in his burning house. Saved from the flames, he discovers he has the potential to become the strongest person on Earth. Will his girlfriend and friends stop him from falling to the dark side of his power, driven by revenge?