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 home!
Bin wieder zu Hause!
¡Llegué!
C’est moi !
Cheguei!