Aichi Sendou is a reserved, rather reclusive contemporary who avoids drawing attention to himself. He only cares about one thing, a rare card from the Vanguard deck named Blaster Blade that he was given as a young child. Because of this card, he begins playing Vanguard, quickly excels at it, and meets new people. The genius Kai Toshiki, from whom he had got Blaster Blade, is Aichi's target, though.
