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.

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.