第 11 集: Rii-san 守護被圍困的社團教室，而 Mii-kun 則因 Taromaru 的失利而陷入絕望。

11

THEY flood into the school as if attempting to take shelter from the torrential rain. The power has been knocked offline. The School Living club room is under siege. Kurumi is unconscious after one of THEM bit her. All alone, Rii-san prepares to keep her promise. Meanwhile, Mii-kun prepares to go to the emergency shelter and find the vaccine, but the thought of having lost Taromaru to THEM drains her will to continue. Just as one of THEM reaches out to grab her, she's saved...by Yuki?! (Source: Crunchyroll)