Buu, a delivery pig, is tasked with delivering a package through a challenging forest. Despite facing obstacles and losing his food and tools, he receives a mysterious letter from the master of the Moon Mansion. The key to solving the mystery lies in exploration and observing people's actions and surroundings. The game also features soothing coffee time by a bonfire and using items and situations to overcome challenges. The game is horror-free, allowing players to explore the night in peace.