Roark was originally a clever and lazy little boy. He thought mathematics was meaningless. In order to escape the boring math contest, he came to an island floating in mid-air. Things on the island are completely different from those on earth. There are also a group of simple and happy residents and five strange desire animals-Kabu. Cabbages with different personalities can realize their owners' small wishes every three days, and can produce eccentric shoes, magical fabrics, delicious food, solid building materials and mysterious figures respectively. This island is ruled by a super narcissistic king who likes to look in the mirror. The four soldiers under the king are not only stunted, but also have four mathematical symbols on their heads. These symbols are closely related to the number generated by Kabu and the wish code.
Since a mysterious wizard appeared, the king suddenly became very interested in children's Kabu, eager to keep them for himself. In order to save Kabu, Roque and his new friends used mathematics to compete with the king and the behind-the-scenes manipulator again and again. ...
Why does the king want Cabo? Is it related to the disappearance of the doctor? Can Roark help the islanders through his math skills?
Different endings
Season 1: the doctor goes back to the past
The second season: Roark and the doctor return to reality. Roque participated in the Olympic Mathematics Competition, with the doctor as the judge and the wish code π in the doctor's hand.