In a fierce showdown, the protagonist Fried faces off against the demon lord alongside his pupil, Lyle. In a climactic moment of triumph, Fried defeats the demon lord, declaring his intent to end the ongoing war. However, his victory is short-lived as Lyle unexpectedly betrays him, launching a treacherous attack. Left for dead, Fried awakens beside a mysterious demon girl who inexplicably dubs him the new demon lord. Now tasked with safeguarding his fellow demons, Fried must navigate a complex path, defending his kind against former allies turned adversaries.