Seigo Akatsuka, his grandfather trained in martial arts high school student, often ends up in a situation where it makes a weak people around him. Once Seigo saves homeless by punks who attacked him. In gratitude, he gives his savior stonewhich is in contact with the hand Seigo suddenly heating up and leaves a mark on the palm - intricate tattoo type. Artifact spell-called cross the unparalleled power of weapons - for the possibility of owning the United States and the Kingdom of Serinistan are hidden struggle that threatens its scope emerge from the shadows to the world stage.Seigo head falls into a whirlpool of events when a mysterious girl with a tattoo similar attacks him. Combat skill is not enough to resist it. Saiga must harness the power of the spell-cross and certainly become stronger.