A lovesick Manami passes out when she sees the object of her affection with another girl. When she wakes up, she finds herself in the world of the cards, where she is forced to compete against Sahgan, her usual ally. In this realm, the matches aren't simply imagined: players summon actual monsters and gods to do physical battle! When she returns to the real world, will Manami be ready to take on Japan's number one "Chaos" player?