Yuta Hibiki wakes up in the home of his classmate, Rikka Takarada, with amnesia. A voice from an old computer, identifying himself as "Gridman," has a mission for him, but can he even survive the next day of school without his memories?
The danger is almost upon you.
Gefahr ist bereits im Verzug!
El peligro está casi encima suyo.
Le danger est imminent !
O perigo se aproxima.