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?
Oh, Yuta! Thank goodness!
Hey, Yuta! Gott sei Dank!
¡Oh, Yuta! ¡Gracias al cielo!
Yûta ! Je suis trop content !
Ah, Yuta! Ainda bem!