Dangorou Sasa is one of the two main mascot characters representing Niigata city. He embarks on a quest to find a mysterious stone that was stolen after falling from the sky, a mission that drives the central plot of his story.

He operates as a duo with his partner, Komachi Hanano. Their investigation is perpetually challenged by a pair of antagonists—a thief and her getaway driver—resulting in a series of confrontations. This dynamic of persistent foes thwarting the heroes' progress echoes the recurring rivalries found in other animated series.

The narrative is a high-energy adventure blending science fiction and battle elements. This journey unfolds across a concise series of only four episodes, forming a complete and self-contained story arc. Dangorou Sasa is designed with a small stature, and the overall artistry is recognized for its reflective beauty and playful animation style. The heartwarming quality of his endeavors is a noted feature.