Nueno Meisuke, Domori High School’s newly-appointed teacher, arrives in the town guided by a feeling of foreboding. Nicknamed Nube, he cares for his students more than others but his enthusiasm tends to prove futile because of his slight clumsiness. He becomes the form teacher of the new Class ⅔. However, the students are enamored with Tamamo Kyosuke, a pretentious, handsome new teacher. Furthermore, Nube shows such an unusual interest in the school’s Seven Wonders just after he takes up his new position that even his beautiful fellow teacher Takahashi Ritsuko gets suspicious. Meanwhile, there is a problem with a student of Class ⅔. Noriko, one of the female students who is called Noro-chan, seems to be spoken to in a strange voice by something in the mirror. Feeling as if the friends around her have stuck her with a meek, inconspicuous character, Noriko is very bothered about her identity and loses sight of herself. Catching the hint that something has worked its way into the darkness of her mind, Nube secretly starts patrolling on the school grounds. In fact, there is another side to Nube. He is the only teacher in Japan with psychic powers which can kill monsters. When his students are attacked by monsters and evil spirits which take up residence in weak human hearts, he would risk his life to protect them by making use of his left hand. In the midst of this, Kurita Makoto, a fan of paranormal phenomenon declares his intention to determine if the “mirror of truth” is one of Domori High School’s Seven Wonders and the students sneak into the school at night.