A Mountain of Corpses, A Sea of Blood

The climactic war between humanity and the demon race ends with the strongest hero, Gron, dying alongside the Demon Emperor. Five years later, Gron awakens within the demons' camp, only to discover his soul has transmigrated into the body of the weakest demon. Unexpectedly, his human soul awakens a hidden power within the body: the ancient Serpent God's power of evolution. Gron, once famous for his extreme sense of justice, will now use this demonic body to unleash a bloody storm.