SSSS.GRIDMAN - S01

Yuuta Hibiki wakes up in Rikka Takarada's room with no memory of who he is. A strange voice calls his name from another room, leading him to discover a robot named Hyper Agent Gridman inside an old computer. Rikka can't hear Gridman or see the shadowy monsters lurking in the thick fog outside-only Yuuta can. When another giant monster appears and attacks the city, Yuuta is pulled back to the computer and merges with Gridman, finding himself in the middle of the battle. With Rikka and their classmate Shou Utsumi, he forms the "Gridman Alliance" to stop the monsters and uncover who-or what-is creating them.