Hitto Tamaga used to live a peaceful life in Manaka City. With his gifted sight he, along with his friend Mamoru Matoba, runs small errands for people who lost their valuables. However, Hitto's life is bound to change on his eleventh birthday.

Therein; Hitto receives his B-Daman, Magnum Ifrit from his father. Since that day forth, several dangerous individuals had been after Hitto's Magnum Ifrit. Making matters worse is that his father has been kidnapped by what Hitto's new friends believed to be the Assassins from the Evil Deity Organization.

With the help of his friends and the power of Magnum Ifrit; Hitto steps forward to rescue his father. Along the way, he slowly discovers the truths about him which had been hidden since the decade past.

(Source: bdaman.wikia)

Note: This manga has a completely different storyline than the anime series.