In "Crest Land," a mysterious "B-Crystal" has started to go berserk. The main protagonist Kamon Godai lives in the south area of Crest Land, and is an energetic boy who loves B-Daman. However, he lost his all past memories of B-Daman and his family, except for his big sister Aona who lives with him. One day, Kamon meets Garuburn, a B-Daman at his local B-Daman shop, "B-Junk," and he finds Garuburn strangely familiar. Garuburn becomes his partner, and he returns to the B-Daman battles once again.