In the anticipated comeback of Yamaji Hidenori from the renowned 'Marry Grave,' a fearsome Overlord faces an unexpected challenge from a seemingly feeble girl. But what hidden power could she possess? As a group of adventurers converges on the Overlord's castle, their encounter leads to the rapid defeat of the top three warriors, instilling terror in all. Amid the chaos, a lone human girl stands unfazed, ready to confront the mightiest demon of all.