I Have Already Lost the Ability to Continue Fighting.
Sonora informs the others about her plans to transfer to America at the end of the month, leaving the other C3 Club members downhearted. Wanting everyone together for an airsoft-style sendoff, Rento searches for Yura, eventually finding her at the arcade in a sorry state. With Yura seemingly residing herself to be a no-good person, Rento snaps at her, telling her to think about how others feel. Noticing Sonora also appears to be waiting for Yura to return, the girls make it their mission to make Yura rejoin the club. Meanwhile, Sonora is visited by Rin, who tells her about Yura's performance and suggests Sonora should act more like she used to. As Yura starts to really miss her friends, she is drawn to the shrine where she once again meets Choujirou, who tells Yura that she needs to accept herself. Finding her old gun in the shrine, Yura overcomes her self-pity and shows up to challenge Sonora in her sendoff match.
Aired 13/09/2013EP 11 - I Have Already Lost the Ability to Continue Fighting.
Stella Women's Academy, High School Division Class C3
Yura Yamato has just arrived at the high school division of Stella Women's Academy, when Sonora Kashima invites her to join a club called "C³". Sonora is the third-year student who became the new head of this club for military survival games. The other members include two second-year students (part-Japanese Karila Hatsuse and G36K-wielding Honoka Mutsu) and two other new students (Rento Kirishima whose family runs a Japanese sweets shop and the really short Yachiyo Hinata).
(Source: Anime News Network)