Kawamura Hideo, a typical ordinary guy with no job, he came to Tokyo searching for jobs. He sent a total of 34 job applications only to fail at the first hurdle (all of the companies didn't even ask him to attend an interview). Feeling rejected, he became a hardcore hikikomori and shut the world around him, and his parents also have refused to send him money since then.
Starting to starve without any money, he lost hope and decided to just go die when he found a computer on the street (containing Will.CO21 virus) and took it home. From the computer, he found a way to participate in a martial arts tournament called "Holy Devil Cup," where the winner can gain the power to rule the world. Martial artists, soldiers, vampires, Majin -- all 3024 participants gather there. What will Hideo, who has no fighting skill whatsoever, do to win this mad tournament...?