After a war in hell, you and your big brother have been kicked out of hell by the new demon king, and there is only one way to get back, cross the magical door that connects the surface world with hell, but to do that you have to get there first! And you'll need the help of the masks, powerful magical devices that enhance your abilities. Explore a world where hell and the surface world are connected by a magical door and meet all sorts of people inhabiting this new strange world!