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?
--Yeah, not good.
--Right, but what is that? I don't get it!
-Sí, no es bueno.
- ¡No entiendo!
-Sim, nada bom.
-Sim, mas o que é? Eu não entendi!