A nerd must fight powerful spirits and aliens all vying for the secret power of his "family jewel," so who better to fight alongside him than his high school crush and a spirit granny?!

Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they'll believe in and what they won't. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they'll have to participate in to believe!

The Fairy-Tale Card notices Zuma's wavering feelings and attempts to escape from the cursed trunk. Turbo Granny asks Rin, who is waiting on the outside, to use Mai's power to get them out of the trunk, but Mai refuses! Instead, she transforms Rin into an idol and tells her she must save everyone through her song. Meanwhile, as the Fairy-Tale Card makes its escape, the trunk's inner world begins to collapse!