Kim Jipsa is the raid leader of the VR game Metaria and, in real life, the guardian of two cats. One day, a mysterious boss forces him into the unwanted Butler class, where he must serve monsters and do menial chores. Just as he begins adjusting to this strange new role, an unbelievable truth is revealed: "A cat... logged into the game?!" His beloved pet Peechu has entered Metaria. But Peechu is not just Peechu. The "Master" who reclassified Kim Jipsa and has been giving him orders is actually Kalinas, the Incarnation of Darkness, now trapped inside the cat's body. With the world's balance at stake, Butler Kim is tasked with carrying out Kalinas's dark mission. Yet instead of worrying about the will of darkness, is he simply happy to adventure through a fantasy world with Peechu?