Kiyo, a genius but introverted middle school student, hates going to school and has trouble making friends_ until one day Zatch comes crashing through his window! Zatch is a present from Kiyo's father, who saved the little tot on an archeological dig.

While Sherry and Brago try to wrench the red spell book from Kiyo, a hooded intruder steps across the threshold of the house, and into the hallway where Zatch stands listening!

Kiyo is beginning to think that Zatch, who shoots lightning from his mouth, is way too much trouble to bring to school. On the way home, Kiyo and Zatch run into Hosokawa and Reycom. Hosokawa says 'I'm not after you, Kiyo, just that kid Zatch.'

One rainy day, a schoolgirl named Lori finds a cute little girl named Kolulu, who is crying. Lori asks Kolulu where her parents are but Kolulu doesn't answer so she invites Kolulu back to her house and they eat dinner together.

A party is being held to celebrate the village having been saved from the hands of the Steng and his mamodo Baltro. During the party, Kiyo fills his father in on the situation to date.

One day, Zatch does not follow Kiyo to school but goes off to play by himself. After helping out Ivy at the botanical garden, Zatch decides to have lunch on a hilltop with a nice view, but he cannot find his box lunch!

One day, Zatch is chasing a yellowtail in the ocean, when he finds a fragment of a broken mirror. Zatch takes a fancy to the shiny object and brings it home with him.

After a scary nightmare where Naomi tortures Zatch, he leaves the house with unusual zeal, thinking that he will finally beat Naomi in a series of challenges and make her stop bullying him.

Zatch, Lien, and Kiyo go to rescue Wonrei, and are attacked by the mamodo, Zabas and the owner of his book, Galliont. Zatch and Kiyo fight back, but are unable to penetrate Zabas' wings.

The Takamine Family goes to a hot spring inn in the mountains. When Zatch and Kiyo come back to their room after enjoying the springs, there is a map to a secret spring nearby in their room.