Momo believes in ghosts. Okarun believes in aliens. To make each other believe what they deny, they head to a spot famous for UFO sightings and a spiritual hotspot.

Okarun and Momo arrive at the tunnel to confront Turbo Granny. Just when they think they've won, a giant crab spirit crashes through the wall.

Momo's childhood friend Jiji has come to stay with the Ayases. He explains that he needs Seiko’s help with some strange phenomena at his house.

On the way to investigate the Enjoji house, Okarun feels uneasy about Jiji's closeness to Momo but finds himself drawn to his friendly nature.

As Momo fends off an attack in the outdoor hot spring, Okarun and Jiji panic over how to handle the mysterious room. Just then, the doorbell rings.