Adapted from the dungeon-crawling game classic Wizardry Variants Daphne, this is a story with simplified DnD rules. You can think of it as a light novel similar to Goblin Slayer.
Once every hundred years, the Gate of the Abyss opens, and the "Curse of Death" sweeps across the continent. Fiends that feed on death run rampant, plunging the world into despair. The king, whose line has sealed the gate for generations, mysteriously disappears. The royal contract falls apart, and resistance seems increasingly futile.
Aisin awakens as an amnesiac undead protagonist. His right hand awakens the power to turn back time, allowing him to repair ruins and rouse bones. In the labyrinth, he encounters Lulunade, a girl visible only to him, and joins forces with the heir to the throne, Prugrit, the knight commander Dylanhart, and others. Together, they seek to recover his memories and uncover the truth behind the fiends' curse.