Momo believes in ghosts while 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.
Momo and Okarun succeed in capturing Turbo Granny through their game of tag; a crab-shaped location-bound spirit approaches them.
Victorious against Turbo Granny, Momo and Okarun regain peace, but for some reason Okarun's thingie hasn't returned.
Aira has the missing golden ball; she can now see invisible things, possibly due to the effects of the ball.
Momo and Okarun manage to pull Acrobatic Silky away from Aira after a fierce battle; Acrobatic Silky has a surprising proposal.
The battle against Acrobatic Silky is over; a normal school life briefly returns to the three before Serpoians show up before them.
Aira awakens the powers of Acrobatic Silky within her; she joins the battle against aliens with Momo and Okarun.
Momo, Okarun and Aira make it through the alien assault by combining their powers; the alien that was supposedly defeated, appears before them.
Momo's childhood friend Jiji begins living in Momo's house; Jiji has been worrying about apparitions in the house he moved into and has come seeking help from Seiko.
Momo and Okarun head to Jiji's house to investigate the case of Jiji's family; there are several shadows watching them.