The anime centers around a boy named Kouta Kouka (Kouka Kouta in Japanese name order, an apparent wordplay on Coca-Cola). Kouta strives to be the world's best Bottle King at the Bottle Battles in the virtual Drink World. He comes across his Bottleman partner Colamaru and then wages battles with various rivals.

A boy finds a strange object while playing hide-and-seek. His grandfather tells him the story of his own youth, and the important role the old lamp played. This story is about the modernization of Japan and the changes that came with it.