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?
Ah, thank goodness.
Rikka, answer your phone!
Ah, gracias a dios.
¡Rikka, contesta el teléfono!
Ah, ainda bem.
Rikka, atenda o telefone!