Fumi Nishioka lives with Kyutaro Horikita and his family of "Sweepers," people who specialize in cleaning the minds of those overcome by negative energy and harmful spirits. Fumi has always displayed mysterious abilities, but will those powers be used for evil when she begins to truly awaken as a Queen?

Kyutaro turns all of his allies into sacrifices in order to save Ataru from the Suzaku snake, and he consequently feeds on Fumi to revive. Although Kyutaro was determined to never feed on any of his sacrifices, it's beginning to look like everyone's survival will depend on him doing so...