Maou-sama, Retry! centers on Akira Oono, the creator and operator of the MMORPG Infinity Game, who is suddenly drawn into the body of Hakuto Kunai, the game's Demon Lord. Instead of awakening in the world he expected, Akira finds himself trapped in a reality that seems to echo his own creation, and the mystery of why he was summoned quickly becomes as important as simply staying alive.
As Hakuto moves through a dangerous fantasy land shaped by magic, monsters, and shifting political tensions, he relies on his knowledge of Infinity Game to anticipate threats, exploit its logic, and survive encounters that would overwhelm an ordinary person. At his side is Aku, a young girl connected to his arrival, whose presence adds both support and uncertainty to his journey. Together they navigate alliances, enemies, and the strange overlap between game rules and real danger, while Hakuto tries to determine whether the world before him is merely a game-like imitation or something far more complicated. Blending action, comedy, and isekai elements, Maou-sama, Retry! puts a creator's perspective at the center of a struggle against a world that refuses to behave like a simple game.