Once the strongest Demon King, Mu finds himself a weak, ordinary worker in modern Japan after a failed conquest. Stripped of his powers, he and his general Asha struggle to adapt, facing mundane problems like finding a cheap apartment and getting jobs. But when the hero Emilia, now powerless and broke, and former allies arrive, chaos ensues. Can Mu protect his new life, or will he be forced to unleash his dormant powers? Watch to see how this unfolds!