22/7: 8+3=? N/A
Other Name: 22/7 Special, Nanabun no Nijyuuni Episode 13, 22/7: 8+3=?, 22/7 計算中
Summary: 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)