Eight love stories start and end in an amusement park. In the neon-lit amusement park, budding romances unfold, along with scenes of breakups. As the Ferris wheel slowly rotates, couples with varying moods sit inside: some on secret rendezvous, some hastily formed couples, and others; lovers with ulterior motives. This film depicts the love stories of eight couples in the amusement park.

Once again, Musashi has encounter Ultraman Cosmos. Now Ultraman Cosmos has gained some new modes to defeat Scropis. Musashi has joined Team Sea to save the Blue Area. But there is mysterious evil monster, Sandros, who wants to destroy the Earth. Now it is up Musashi and Ultraman Cosmos to defeat Sandros and who’s the other Ultraman?