As tranquility settles in the demon realm, Anos Voldigoad yearns to shed his infamous title as the Demon King of Tyranny and resume his role as an outcast at the esteemed Demon King Academy. Yet, his respite is short-lived as malevolent demons, monarchs, and gods conspire against him in the shadows. Whispers circulate about a mysterious 'Child of God' whose strength rivals Anos's own. To unravel the mystery and neutralize this potential threat, Anos embarks on a perilous journey into the enigmatic realm of spirits. The path to the spirit world is veiled in secrecy, demanding daunting trials for entry. Armed with unmatched power and unwavering self-assurance, Anos prepares to vanquish formidable foes boasting grandiose titles. However, aided by his loyal comrades, the true Demon King of Tyranny faces these challenges with such ease that victory seems inevitable.