Upon discovering that Tarōmaru has gone missing, the girls go off in search of him. Following his tracks down to the basement, Kurumi finds Tarōmaru, only to find he had become infected. Managing to lock Tarōmaru up, Kurumi enters the underground shelter only to discover that the zombie who bit him is none other than Megumi herself, becoming bitten by her when she hesitates to attack her. As the girls struggle over what to do as Kurumi's condition worsens, Miki learns of an antidote located in the shelter and decides to go to the basement, but is soon overcome with grief over Tarōmaru. Meanwhile, as zombies start making their way inside the school, Yuki begins to remember something.