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?
--Hibiki!
--Yuta!
Yuta!
-¡Hibiki!
-¡Yuta!
– Hibiki ?
– Yûta !
-Hibiki!
-Yuta!