In the super-high-quality VRMMO Meltis Online, player Rindou Amane, who goes by the handle Rinne, finds herself face-to-face with her in-game guide: a relentlessly cute, saccharine angel. Rinne loathes this type of character, and in a moment of frustration, she punches the angel. Rather than being punished, she stumbles into a hidden event. A strikingly cute gothic lolita evil goddess appears and offers her the secret, overpowered profession of necromancer.

Rinne accepts and begins to explore the game with her new abilities. She raises undead servants, befriends monsters instead of killing them, and discovers one hidden event after another. Her unconventional playstyle lets her level up at an explosive rate, crushing enemies with overwhelming teamwork. As she gains power and recruits strange new party members, her chaotic choices escalate. Unbeknownst to her, every disaster-level mistake pushes the game world closer to its end. What started as a single rebellious act against a tutorial angel snowballs into Rinne accidentally triggering the apocalypse, making her and her group the ultimate threat in the world of Meltis Online.