結城友奈は勇者である -鷲尾須美の章- 第１章「ともだち」

Sumi Washio is a sixth-grader the Taisha has already armed: she, Sonoko Nogi and Gin Minowa hold the line against the Vertex that keep striking the Shinju's barrier, the only thing keeping Shikoku habitable. The trilogy's first film opens on the three learning to work as a team, a bow, shifting rounds and twin axes between them, in year 298 of the era of the gods. It adapts the light novel prequel, set two years before Yuna Yuki's Hero Club.