Hikaru, a seemingly ordinary high school student with a brilliant scientist father, cherishes moments with her best friend and daydreams about her crush while indulging in her favorite superhero series. However, her world is upended when a mysterious past resurfaces, revealing her royal lineage from a distant planet. Shockingly, she discovers her role as the sole survivor of this lineage and the guardian of a powerful armor pivotal in determining the galaxy's destiny.