A nerd must fight powerful spirits and aliens who seek the secret power of his "family jewel." Who could help him better than the girl he likes and a spiritual grandmother? Momo Ayase and Okarun are on opposite sides of the supernatural spectrum regarding what they believe or do not believe. Their quest to prove each other wrong leads them down a path filled with secrets and supernatural battles. An seemingly invincible kaiju attacks! Okarun contemplates the idea of reconstructing the nanoskin that repaired Momo's house into a form they can use to counterattack, but he lacks the imagination, so Kinta Sakata—also known as Erosuke—comes to save the day! The nerd uses his extensive knowledge of sci-fi to transform Momo's house into… a giant robot Buddha!