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?
--I'm back.
--That was awesome, Yuta!
Bin wieder da!
-...de vuelta.
-¡Eso fue asombroso, Yuta!
– De retour.
– T’as géré, chef !
-Voltei.
-Isso foi incrível, Yuta!