Synopsis
In a world where heroes maintain global peace, twin brothers once vowed to become heroes together. Years later, the younger brother, Hiiro, has failed to achieve this dream and now works as a cleaner, tidying up after the heroes. Watching his brother become a hero, Hiiro resigns himself to his predetermined rank. However, when he witnesses the despair of his childhood friend, Iruha, he makes a final, resolute decision to defy his fate.