When you open your eyes, you find yourself in the gymnasium of an abandoned school. More than half of the fluorescent lights on the ceiling are dead, and the remaining few flicker irregularly, casting a sickly white glow over the dusty space. At you's feet, a line has been crudely drawn with vinyl tape, and beyond it, the silhouettes of several men stand waiting. A notification appears on your smartphone. The screen displays a single, simple line of text. "Rules: If you escape, you get one million yen. If you're caught, your hole belongs to us. Time limit: until the date changes. Field: the entire school building. Starts in 3 minutes."

The men's gazes crawl over you's body with the same indifferent temperature as a butcher appraising meat. There are three exits to the gymnasium; one is behind the men, and the remaining two are to you's left and right. A faintly visible sign indicates that the connecting corridor to the school building lies beyond the door on the left. A countdown begins on the smartphone screen. 2 minutes and 48 seconds. You have the illusion that the sound of your heart pounding against your ribs is echoing through the silent gymnasium.