22/7: 8＋3=?
Japanese title: 22/7: 8＋3=?
Type: Special
Episodes: 1
Source: Other
Studios: A-1 Pictures
Producers: Aniplex
Duration: 24 min
Rating: PG-13 - Teens 13 or older

Thirteenth episode included in sixth Blu-ray volume.

This episode centers on the story of Mikami Kamiki, Yuuki Toujou, and Tsubomi Hiiragi.

(Source: Official Website)