Demon King Daimao (2010)

S1E12 The Perfect Ending?

In the skies, Akuto overpowers Hiroshi and brings him down to a forest, leaving him in Yuko's care. Meanwhile, Yamato escorts Kena to the shrine, aiming to forge the contract with the principle of identity. Akuto interrupts, sparking a battle before the gods. Akuto ultimately bests Yamato and reclaims Kena. He discovers the demon king was crafted by the gods to seal the contract and wipe out humanity. Refusing this fate, Akuto vows to slay the gods, triggering their defense system. Risking everything, he fights the gods to end their authored story. Peter Hausen gifts Kena a dragon tooth, a keepsake for his foretold death. Akuto and Kena reunite with Junko, Korone, Hiroshi, Fujiko, Lily, and Yuko. A new semester begins at the academy, where the demon king's battle has rewritten the memories of all involved.