3rd year exchange student Cat and her 2nd year friends Kaitlyn and Leah, along with a group of Cat's other peers, arrived back at Megurigaoka Private High School after a vacation to find the place in ruin, ravaged by the infection and infested with the zombified students that still remained there. Cat's friends weren't sure if going back was such a good idea, but Cat was optimistic that if they worked hard enough, they could make the school habitable again.
11 parts