The Hero Is Overpowered But Overly Cautious, Vol. 6 (manga) — Light Tuchihi

With stakes this high, is there such a thing as being “overprepared”?!

Arriving in the nick of time to save Rista from sudden betrayal, Seiya clashes in a fierce battle with a demonic Emperor Wohlks. Up against the God Eater, a sword capable of destroying the very soul of a being, Seiya quickly finds himself in a fight for his life! What's worse -- no one heard him say, “I'm perfectly prepared…” With the Demon Lord still alive and the fate of Gaeabrande on his shoulders, will Seiya be able to overcome such a fearsome enemy?!