The film tells the story of a new transfer student interested in her surroundings, and a song that brings happiness to her and her classmates.

Somewhere in the school at noon, one might hear the sound of two girls playing table tennis together as they wait for time to pass by. As if by fate, two students—Sakura Adachi and Hougetsu Shimamura—stumble upon each other on the second floor of the school gymnasium. As they gradually foster a budding friendship, their feelings for one another only become more ambiguous. Growing closer by the day, the two must learn to navigate their contrasting personalities as well as determine the depth of their affection for each other. The nature of this relationship gradually shifts when one of them starts to develop feelings beyond the boundaries of a platonic relationship. Even so, Adachi and Shimamura must realize if forming a bond stronger than friendship will bring them closer or tear them apart. [Written by MAL Rewrite]

With the completion of the Summer Troupe's show, Izumi Tachibana must now recruit five members for the next sub-troupe, the Autumn Troupe. Luckily, enough people arrive at the audition: Banri Settsu, a talented but boastful jack of all trades; Juuza Hyoudou, a stone-faced delinquent passionate about acting; Taichi Nanao, a man wanting to impress girls through the stage; Omi Fushimi, a college student, amateur photographer, and adept cook; and Sakyou Furuichi, a yakuza member who shares a past connection with the Mankai Company. But between the non-existent teamwork and multiple threats jeopardizing the show's success, Izumi realizes that the troupe might be more difficult to handle than she first thought. How will she be able to unite them in time for their debut performance?

The Republic of San Magnolia. For a long time, this country has been besieged by its neighbor, the Giadian Empire, which created a series of unmanned drones called the Legion. After years of painstaking research, the Republic finally developed autonomous drones of their own, turning the one-sided struggle into a war without casualties—or at least, that's what the government claims. In truth, there is no such thing as a bloodless war. Beyond the fortified walls protecting the eighty-five Republic territories lies the "nonexistent" Eighty-Sixth Sector. The young men and women of this forsaken land are branded the Eighty-Six and, stripped of their humanity, pilot the "unmanned" weapons into battle... Shinn directs the actions of a detachment of young Eighty-Sixers while on the battlefield. Lena is a "handler" who commands the detachment from the remote rear with the help of special communication. The farewell story of the severe and sad struggle of these two begins! (Source: MU, Yen Press; edited)