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 can't remember anything.
Oh, no, I've lost my memory--
Ich kann mich kein Stück erinnern.
No recuerdo nada.
Oh, no, perdí la memoria...
Je me souviens de rien.
Eu não consigo lembrar de nada.