On the first day back after summer break, high-school student Aoba is attacked by a giant robot that appears out of the sky. As he's pursued through the city, his classmate Hina appears in a robot of her own...

In 202x, robots have become essencial partner for humans. One day, a silver security robot went out of control regardless of its emergency shutdown and people were in panic. The robot military unit "SARF" es...