Modest Heroes will consist of three shorts by three different directors: "Kanini & Kanino" ("Kanini to Kanino") by Hiromasa Yonebayashi will be a 15-minute fantasy adventure story of two crab siblings, and will be long. "Life Ain't Gonna Lose" ("Samurai Egg") by Yoshiyuki Momose will be a 15-minute "human drama" showing the love between a mother and a boy. "Invisible" ("Tōmei Ningen") by Akihiko Yamashita will be a 14-minute "action spectacle" that centers on the lonely struggle of one invisible man. Studio Ponoc describes the shorts as "tales of modest heroes of our times."

(Source: ANN, edited)

These are the recollections of a group of men who bet everything on their bicycles. The central pillars of their respective teams, the third years. New stories revealing their pasts are about to begin!

After the Earth was destroyed by mysterious alien lifeforms known as the Gauna, surviving remnants of the human race escaped to space in the enormous generation ship Sidonia. Having drifted through space for millennia, the Sidonia found itself once more under attack from Gauna for the first time in a century. Once again facing the threat of extinction, a temporary victory against the Gauna was eked out thanks to the human-Gauna hybrid Tsumugi Shiraui and ace Guardian mech pilot Nagate Tanikaze. 10 years later... The people of Sidonia enjoy a brief respite. Peaceful days pass, during which Tsumugi begins to realize her feelings for Nagate, who is now celebrated as a hero of Sidonia. However, as Captain Kobayashi has always known, as long as the Gauna remain, peace cannot last. The decision is made: a final battle, upon which rests the fate of humanity's last survivors. As the end approaches, will the crew be able to protect those they love?

Makina Agatsuma, the school idol, moves into the home of Eita Akutsu, an introverted mechanical otaku. Eita, who has secretly harbored feelings for her, thinks he's hit the jackpot! But it turns out, she's actually a robot made for sexual purposes. Caught off guard by her sudden physical advances, the virgin Eita is at a loss. Furthermore, he finds himself in a frenzy trying to help her maintain her secret identity. A romantic comedy with a slightly risqué mechanical revelation, where hilarity ensues as they try to keep the secret under wraps!