Hikaru, Seira, and Yuki are three female warriors of light who hunt for evil spirits. In pursuit of another monster from the darkness, named Varmus, they wander into their own school... And there's a surprise waiting for them. A specially arranged "warm" and "slimy" meeting. A bunch of their classmates and teachers, possessed by demons, first squash the girls with a generous portion of tentacles, in all the crevices...Well, then they themselves come into practice.