Kazunari Katsuki (Gaku Sano) lied to his classmate that Tokyo stinks. Because of his comment, he goes to Tokyo alone. On his way back, he misses his flight back to Kumamoto. Kazunari only 3,400 yen in his pocket. He becomes confused about his missed flight. At that time, Masami Tanaka (Kaoru Sugita), who works at an airport souvenir shop, talks to Kazunari. On Kazunari's unusual trip back to Kumamoto, he meets many different adults and begins to think about his life.

A rainbow-colored tornado takes Haruto and Koyomi to an alternate reality called "Magic Land". There, its residents never developed science. Instead they put extensive research on magic. As a result, anyone has an ability to use magic, and some of them can even transform into a Kamen Rider Mage. When Haruto arrives, he meets a young orphan called Shiina. As Haruto explores Magic Land, he finds the Emerald Palace and meets Emperor Maya. He also meets Prime Minister Orma, who is known as Kamen Rider Sorcerer, who does not appear what he may seem to be...