Miki Sabishii has been playing games all of her life, and is known as Xth all over the internet world. She's a certified genius, who also happens to be clinically crazy, but her fans don't have to know that. The 15 year-old mute girl is summoned by a God who recently realized he has made a mistake in challenging "Blank", the only gamer Miki had ever lost to. The god, Tet, plans to use the girl to keep Blank from taking Tet's spot as the True God. Will Miki and Tet be successful? Will Miki get to meet blank? Or maybe she'll even fall in love...