In Crest Land, the mysterious B-Crystal has begun running out of control. Godai Kamon, a lively boy from the southern part of the land, adores B-Daman, yet every memory of the game and of his family is gone. Only his older sister Aona, who shares his home, remains. At B-Junk, his neighborhood B-Daman shop, Kamon comes across a B-Daman named Galvan that seems oddly familiar to him. With Galvan as his new partner, he steps back into B-Daman battles once more.