Mikoto Misaka is back at Mount Justice, and everything is normal...well, as normal as it gets for a powerhouse Kryptonian-esper living a superhero life with her messed up friends. It's perfect.....until a boy comes along, claiming to be Bruce Wayne's son from the future. He says Mikoto needs to come back with him.....he tells her it's urgent, that the future is in grave peril. Naturally, she agrees, but even for Super Railgun....can she face an alien invasion head on?
21 parts