The series tells the story of The World of Rules descending on Blue Star. The protagonist Tar is unexpectedly selected as a game player: if he dies in a game instance, he will also die in the real world. Fortunately, the protagonist can see hidden clearance clues when reading the rules. Tar is then teleported to a mysterious dormitory with only two sets of bedding, where he gains memories of a college student's Internship, and the dangerous survival game officially begins.