An ordinary high school student Kaname started the app "Darwin's Game" after receiving an invitation from his best friend one day. This game gives each player various supernatural abilities known as Sigil and each are forced to risk their lives in this battle between the supernatural ability users. Since it is possible to die as the worst situation in this game, Kaname, who wanted to quit the game, seeks advice from another player, Shuka on the method to retire from the game. But he was shocked after finding out that there is no way to quit after joining the game.
Among them, Kaname received a call from the GM after clearing the event "Treasure Hunting Game" and found out that it is possible to quit the game by clearing the game or destroying the system. Thus, Kaname formed the clan "Sunset Revenge" and aims to clear the game.