In the story "Hollow," author Kitsundere presents a cast of characters set in the year of 2025 who live normal plain lives until everything changed on the day of August 8th. After an experiment took place in the laboratory of the Morinomiya University of Medical Science went wrong, it has since caused the dead to rise and for total mayhem and chaos to erupt in Japan. The undead begin to invade Osaka Prefectural Shimizudani High School and everyone inside is being devoured or turned into monsters. During all the chaos, one class tries to band together to figure out a way to get through the oncoming waves of the undead and out of the school. Will they be successful and make it out of school to a fallen society or will they all never make it off the school grounds?