Yggdrasill Corporation transformed Zawame City into a feudal-like city. To escape the city authority, many of the youth formed dance crews along with the rising of a game that uses the mysterious Lockseeds that can summon Inves monsters.

Zawame City is a company town where the Yggdrasil Corporation. In the city, young street-dancers divide up into a few groups. They enjoy dance battle and a sport that fighting between small animals summoned from a different world, but monsters also come after a while. A former street-dancer, Kouta Kazuraba gets a gadget that can him to make a Kamen Rider, wants to protect people against monsters.