Humans dissapear everyday. Sometimes they are found, brought back to their loving family. Sometimes, they are found dead. Sometimes,there are no leads to their fates.. as if they dissapeared from the world.  Magnolia was faced with such an situation before. Her oldest brother dissapeared on family outing to amusement park. Several years later, she might have gotten an clue to his fate. Normally, she would have rejoiced.. but situation was dire.  Somehow, she got transported to other world, and appeared in some sort of dungeon.  Floating blue boxes telling you are screwed? Certain actions gives you experience? You can learn skills? There is even magic? Where had good old common sense gone?