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.

Momo awakens psychic powers, while Okarun is cursed by Turbo Granny. They evacuate to Momo's house, but a giant alien appears before them.

After Momo's grandmother temporarily suppresses the evil spirit within Okarun, she says that a game of tag may be the key to defeating it for good.

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 and Okarun’s ordeal with Turbo Granny has brought them closer, but things remain awkward between them. Okarun realizes he still has a problem.

Turbo Granny reveals that Okarun's missing organs are contained within golden spheres. Aira, who has found one, now has the ability to see spirits.

Momo and Okarun manage to weaken Acrobatic Silky but make a shocking discovery regarding Aira. Acrobatic Silky suggests a surprising way to help.

Aira begins to develop a crush on Okarun. As the three friends' emotions intertwine, they suddenly face another extraterrestrial emergency.

Wielding Acrobatic Silky's power, Aira fights the Serpoians alongside Okarun and Momo. The frustrated Serpoians power up their crustacean-like minion.

Okarun and the girls try to clean up some misunderstandings with their classmates. Later, the aquatic creature reappears before Momo and Aira.

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.

In a bid to free Okarun and Momo from the Mongolian Death Worm’s psychic power, Jiji attempts to carry them to safety but runs into a powerful entity.

Unwilling to leave Jiji behind, Okarun helps Momo escape to the surface. Momo then begins forming a plan to expose the Death Worm to sunlight.

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