Upon arriving at Amagiri Gakuen, the new high school he'll be attending, young student Naruyuki Touya is greeted by chaos: a malfunctioning robot on the platform and unexpected assaults from a girl and a classmate. Curiosity piqued, he wonders about the identities of his attackers and the girl's uncanny knowledge about his father. As he tries to unravel the mystery behind his connection to the school, more questions arise.