Ginta is an ordinary 14-year old boy, but he keeps constantly getting a weird dream that turns into reality when he gets sucked into an alternate world. Upon entering the world, he finds the dangerous ARM - Babbo, in which killed many people until it was sealed years ago. Upon acquiring it, Ginta faces many test, which will eventually leads him to the truth about his father, and will strengthen him for the last test, to fight against the evil Flag Army Ginta Toramizu is a second year student at a junior high school. He is constantly dreaming of the same dream about an imaginary world for a lot of times. He finally got to the world through a strange device known as 'ARM'. This manga tells of his adventures in the imaginary world.