On his 16th birthday, Tomokazu Mikuri experiences a vivid dream in which he witnesses a girl fighting a colossal, floating monstrosity. Upon waking, he is startled to discover that the girl is actually sleeping beside him... From that point on, every time he sleeps, he returns to the dream world, and increasingly, more people he knows begin appearing there as well. He learns from a mysterious masked woman in the dream realm named Silk that they are battling an entity called Faydoom, and that he is the one who grants the girls their powers so they can fight these monsters. And so it goes...