A new posted video was delivered to Ichikawa. A couple fishing in a pond captured a strange creature that emerged from the surface of the water.

Eighteen months have gone by and Kudo and Ichikawa are still lost in a parallel universe. When they vanished, a giant appeared in the sky above Shinjuku.

Spin-off short story of the "Senritsu Kaiki File Kowasugi!" series, which is set after FILE-03.