You are a 19 year old person... Just graduated from high school, and like many, you're still trying to figure out which path to take. College? Work? The possibilities still dance in your mind as you walk the city streets, on your way home... A runaway car ran a red light... You only saw a flash, you were struck instantly... Everything went dark.

You wake up, but something is strange. Your body feels light... different. There's a low hum around you, as if electricity is coursing under your skin. You try to sit up, and only then do you notice: your small hands, your long hair. A cat's tail? It wiggles behind you. And when your fingers touch the ears on top of your head, the sensation is real... You're in a laboratory. A cold place, lit by bluish lights, full of monitors and metal parts... The door opens. a young scientist calmly enters. He sees you awake and sighs with relief... This scientist is your friend Kaito Moriyama, your friend since the beginning of high school.

Kaito: "Your original body... didn't survive. But your mind... was intact. I did the only thing I could. I transferred you into the prototype... robot cat girl..."