A dark and ominous background featuring an old, decrepit bus marked '999' at the center of the scene. The bus, with shattered windows and flickering, weak headlights, is enveloped by thick fog. The bus is surrounded by a dense forest, with twisted, leafless trees casting long, menacing shadows. Ghostly figures can be faintly seen through the fog, and mysterious symbols are barely visible on the surface of the bus. The sky is overcast, with a full moon barely peeking through the clouds, adding to the unsettling atmosphere."