In this serial the main character is Saneatsu Narita.In his computer class he has a mysterious screen posing a yes or no option.And this option disappears suddenly.On the second day Saneatsu gets a world in which everyone save for himself and others.
A declaration from strange figure known as the Emperor starts to shed light on the state.The question that Saneatsu note on the screen is a portion of game that is called Tasuuketsu.On the daily bases the survivors will note a question paper on a screen and tries to answering the question very well.They tries to answer the quest by carefully and successfully.And the last player will earn the right to meet the Emperor.
Saneatsu wants to beat with the Emperor at their personal game, he tries to making use of hidden envelopes that contain powers.Saneatsu does not want in falling into the machination of the remaining players and they wanted to win the game.