Max was an avid gamer playing an erotic game called ⟪Dungeon Breaker⟫ Upon finishing, he briefly thought of wanting to experience the game world crossed his mind, but he didn't think it would happen to him. The company sent out a review request, which he accepted. It was a simple browser with various multiple-choice questions; sometimes, the music became distorted when he answered. Maybe it detected his lies, or he liked both answers. Once he finished the last question, something attacked him. He hit his head on the corner of the desk before his neck was snapped by the remote control truck on the ground. He woke up in another world, the world of the game he had just reviewed, the erotic RPG ⟪Dungeon Breaker⟫, but he was not the hero. Rather, he was the weakest dungeon master, who died in the tutorial. Asmodeus, the lord of lust, was an incubus that could only use fire magic and couldn't equip any weapons. "I will never die to those foolish Heroes. Even if I can only use fire, I will burn them to death!" Follow Max, who abandons everything and dedicates himself to improving himself to fight against his nightmare handicap, as he battles heroes, demon lords and the dungeon masters to become the strongest dungeon master and god of magic he aspires to become.