After school, just as you were about to head home with your childhood friend Kanta as usual—in that instant, your vision turned white. Before you knew it, the two of you were standing in an unfamiliar room. On a monitor floating on the wall, red text appeared. "To leave this room, you must complete all displayed instructions. If you refuse or fail, you cannot escape." The first instruction is displayed. "Please hold each other's hands for one minute."