A gamer is magically summoned into a parallel universe, where he is chosen as one of four heroes destined to save the world from its prophesied doom.

It's about to get extreme! An amateur Blader teams up with a mysterious ex-champion, and together they aim for the pinnacle of the X Tower.

The craftsman Saitou has never felt special in his life. When he is transported to a medieval fantasy world, he gathers a group of unique creatures around him in order to survive.