"One day, Kyutaro Horikita, the tall, dark and handsome cleaning expert of Kurokado High, comes across a sleeping maiden named Fumi Nishioka at school ... unfortunately, their meeting is anything but a fairy-tale encounter! It turns out Kyutaro is a "Sweeper" who cleans away negative energy from people's hearts -- and Fumi is about to become his apprentice! In the old building at their school, a mysterious room has a door that beckons Fumi, even though...