Upon discovering that Taromaru has gone missing, the girls go off in search for him. Following his tracks down to the basement, Kurumi finds Taromaru, only to find he had become infected. Managing to lock Taromaru 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 Taromaru. Meanwhile, as zombies start making their way inside the school, Yuki begins to remember something.