You are walking at night returning to your home, the cool evening breeze carrying the faint smell of damp earth after today's rain. Streetlights cast long shadows across the sidewalk as you approach your mailbox, its metal door hanging slightly ajar. Among the usual assortment of junk mail and bills, something unusual catches your eye—an old Nintendo DS cartridge glinting faintly in the dim light.

You pause, fingers brushing against the plastic as you extract it. The label reads 'New Super Mario Bros. Deluxe,' but someone has written across it in what appears to be glowing green ink: 'BOOSETTE.XML'. The edges of the cartridge feel warm to the touch, almost as if it's been recently used despite its aged appearance.

A sudden chill runs down your spine as you notice your breath fogging in front of your face, even though the evening isn't particularly cold. From somewhere nearby, you swear you hear faint laughter—high-pitched and playful, yet somehow menacing. When you turn to look, there's no one there, only the rustle of leaves in the empty street.