Chijou Saikyou no Otoko Ryuu

Summary

Karate fighter Raion Ryuu is so unflinchingly powerful that, during a sanctioned match, his strikes accidentally explode his opponent into piles of steaming meat. As punishment he dons a sutra-infused mask to suppress his horrific might and goes into hiding with his psychic sister, but the two are eventually hunted down by his ex-master and the fiancé of the man Ryuu killed. While their modus operandi would appear to be revenge, they follow divine instructions from up above-destroy Ryuu before he can awaken as the Antichrist! God himself has put out a hit on our masked hero. (Source: MU)