Chijou Saikyou no Otoko Ryuu

Karate fighter Raion Ryuu is a martial artist of terrifying power, whose strength proves too great for the ring. After a devastating incident during competition forces him into exile, he takes refuge in anonymity, concealing his identity behind a mystical mask that binds his overwhelming abilities. Accompanied only by his psychic sister, Ryuu attempts to disappear from the world that once celebrated him. But shadows from his past refuse to let him vanish—forces both human and divine converge upon him, driven by purposes that extend far beyond mere vengeance. As ancient prophecies stir and heavenly powers take notice, Ryuu finds himself at the center of a conflict that challenges not just his formidable skills, but the very nature of his existence. (Source: MU)