Mikami loves games, and has a talent for making them too. He enrolled into computer club just to make a game. His childhood friend Itsuki is worried about what his future will hold for him. One day he went to buy a game for resource to make a gal game. On the way back in the train, he bump into someone and dropped his games all over the floor, but someone helped him to pick them up. When he got home and check for his games, he found a game that he didn't recognize buying, "Not Alive". When he tried to take out the disk to play it, something strange occurred and it went into his body. By the time he realized anything was going on, had been transferred into a game as a girl, and thrust into battle!

Clockworkers- mechanical men, created during the war as a weapon to kill as many as possible. That war may be long over, but rogue Clockworkers are still roaming about, spreading fear and death wherever they go.

Machina's a member of the CWA, an organization dedicated to the destruction of these rogue robots.

Along with Deus, her Clockworker partner, she travels the country in pursuit of these dangerous robots...