Akio Hoshigami's running career ends before it truly begins. A leg injury in 2006 forces her to abandon her dreams of competitive track and field, leaving her adrift as she enters high school with her best friend Ayano. The transition feels manageable at first. New classes, new faces, and the simple rhythms of school life slowly help Akio rediscover who she is beyond athletics. She laughs more. She connects with people. For a moment, it seems like she might actually be okay. Then Ayano vanishes without explanation. Desperate to find her missing friend, Akio stumbles into a world she never knew existed. Giant mechas, advanced technology, and secrets buried beneath everyday life collide with her ordinary reality. The search becomes something far larger than she anticipated. What starts as a personal quest transforms into something that demands everything from her: her courage, her resolve, and her willingness to fight for what matters most. In losing her path as an athlete, Akio discovers a different kind of strength entirely.