A mysterious girl crashes into thirteen-year-old Meguru Tokio's life, fleeing from forces unknown. She shares Meguru's name but carries herself with a fierce confidence that the younger girl can't quite match. When the stranger reveals she's being hunted by a shadowy organization, Meguru Tokio becomes their target too. Denial and confusion give way to action as the two are forced into a dimensional mecha, piloting a robot that bridges past and present. Their opponent is Rei, a vain operative from the organization with his own agenda and no shortage of arrogance. As battles rage and secrets unravel, Meguru Tokio discovers something impossible: the older girl isn't just a stranger or ally. The connection binding them runs deeper than either anticipated, rooted in a future she never expected to meet face-to-face. Fighting alongside her own descendant against an organization determined to reshape time itself, young Meguru must trust in bonds that transcend her understanding of how life works.