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?

Fumi and Kyutaro finally become sweethearts after they finish their training in Seichi! But while the two lovers are enjoying their life together, the Horikita family can't help but worry about the snake that's sealed within Kyutaro. Will Kyutaro be able to overcome the evil inside him?