Rei is reborn into the demon faction of a video game, bound to serve Fiona the Demon Queen--only to arrive just as her army is completely wiped out, leaving him the sole surviving subordinate. Fortunately, he gains a unique Dungeon Master skill that lets him build lethal traps, reshape dungeons, and even resurrect the legendary Four Generals. Eager to prove himself, Rei sets out to restore a ruined labyrinth.
Yet his efforts quickly spiral out of control, turning the labyrinth into a chaotic, broken disaster that unleashes an unstoppable demon army. With catastrophe looming once again, Rei is abruptly promoted from soldier to Fiona's right-hand man. Now, alongside the formidable Demon Queen, he must prove he has what it takes to stop the very forces he unwittingly set loose.
