Planet With

Even though he has no memory of his past, Kuroi Souya, a high schooler, lives a peaceful life until his town is attacked by a Nebula Weapon. With the help of a cat-like character called "Sensei" and gothic lolita Ginko, he becomes part of a battle against seven superheroes who protect the town. However, what truly drives Souya to fight are the secret memories he carries within.