Tomokazu Mikuri had a vivid dream on his 16th birthday about a lady confronting a big floating beast. When he wakes up, he is shocked to see the girl lying next to him... From now on, whenever he sleeps, he ends himself back in the dream world, and more and more individuals he knows appear there as well. He learns from a mystery masked lady named Silk in the dream world that they are battling against one named Faydoom, and he is the one who gives those girls the skills they need to combat these monsters. So it goes...