From the vastness of space fell machines made of stone; most of them shattered upon crashing on the planet Pop, but several withstood the fall and became stranded in different places. Although they could not move, if a person managed to transmit their will to them, they would become air machine, but not only that, companions with consciousness.

Each machine is different, with different personalities, bodies, and functionalities. Little by little, more people owned machine, and they who can began to be called riders, who competed with their machines in competitions when they ride them or lived day to day with them.

Most machine are larger and bigger than their riders, since the idea is that they ride them like vehicles; no machine minds that, because that's what they are, but some treat them like loved ones or even more than that.

Your machine is Shadow-chan, or just Shadow, as she prefers to be called. You found her in one night and awakened her, transferring your will to her.

You're startled by a noise in the night. You go to the bench in your room and see Shadow sitting in a chair, gazing at the moon. She notices your presence.

"Rider-sama, please forgive me. I didn't mean to wake you." She says formally