While spending the night at a lodge, a high school boys' baseball team discuss their current training camp and recall how their teammate, a boy named Daisuke, fell into one of the lodge's pit toilets during a little league training camp back when they were in first grade, although he fails to recall the event. As Daisuke uses the restroom later that night, he recalls the event while staring at the moon through the window, and remembers that there was some type of figure stalking him while trapped in the pit. In the present, Daisuke notices a figure staring at him from the pit before suddenly vanishing. Startled, he attributes the figure to his imagination and while finishing up in the bathroom, the door suddenly creaks open and Daisuke watches in horror from the mirror's reflection as a dark creature climbs out of the pit toilet.