In Kaminoyama High School, animation club members and good friends Aoi Miyamori, Ema Yasuhara, Shizuka Sakaki, Misa Tōdō, and Midori Imai promise to each other that they will make an animated feature together one day. Two and a half years later, Aoi is working as a production assistant at Musashino Animation, an animation studio that is currently working on an upcoming anime for the fall season, called Exodus!. She visits Misato Segawa, the animation supervisor for the anime's fourth episode, to retrieve the checked animation...