Baabu narrating his own zombie existence while Rea stumbles through high school as an undead girl transforms what could've been throwaway filler into something genuinely strange and sad. The show lets a cat think about deterioration and mortality in ways the main series never bothered to, then undercuts it all with Rea accidentally crushing her desk with zombie strength. It's the special that proves Sankarea understood what made it work: the comedy of pretending normalcy while everything around you is actively falling apart.

Baabu the cat narrates this extra episode, describing what life is like as a zombie. Rea attends her first day of school as one of the undead, and her zombie strength proves useful both there and at home, even as her body decays. Meanwhile, Baabu grows interested in a female cat who is still alive, but he ends things with her when he starts slipping into a confused state. Elsewhere, a scientist who studies zombies arrives in Japan, hoping to find new samples. Released on the sixth BD/DVD volume and effectively serving as a thirteenth episode, the special mixes comedy, romance, horror and ecchi elements with its supernatural premise.