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