Reborn as a demon lord in another world, Yuki’s story continues! He succeeds in entering the royal capital to hunt down the crown prince, who’s determined to threaten the sanctity of his peaceful dungeon life. What he finds there, however, is a darkly transformed city overrun with Undead. Deciding to go ahead of the hero Nell and company, he infiltrates the royal castle, where he stumbles into a misunderstanding with the castle’s maids while also somehow managing to rescue the captive king. Then, after finding his princely target, Yuki launches his attack! The prince’s behavior and the disturbing atmosphere blanketing the area strike him as odd, though. His suspicions aroused, he uses Analysis to figure out what’s going on, and a shocking truth comes to light!