This is the third installment of Room Barrier, featuring a special appearance by SOD star Iori Kogawa! The protagonist, Kiyoshi, is a janitor at Otsuki Academy and has been disliked by the female teachers for stealing their underwear. One day, he hears a voice coming from a room and when he removes the talisman, he becomes possessed by an evil spirit and gains the power of the barrier. Using this power, he begins to dominate the female teachers and his revenge unfolds...