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

Its time for the final battle against the Demon Lord! ...Or at least, its supposed to be, but Seiya suddenly goes missing while the rest of the party is taking a short breather in the imperial capital before the moment of truth?!?! Theyll have to track him downand when Ishtar reveals the secret of Seiyas past, his uncharacteristic rashness starts to make a lot more sense...