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?

A field trip takes the class away from the city for some summer fun, but when trouble occurs so far from home, there's no easy way to get to Junk.

Akane tries to win over the Gridman Alliance by lulling them into a dream. Will they remember each other and Gridman's calling or forever have sweet dreams?

Disaster strikes on a morning like none other and it's hard to tell friend from foe. Akane seems to have all but given up, but Alexis has other plans in store.