When the world is shrouded in a strange rule book, you can live if you follow the rules, and you will die if you break the rules. Silence discovers that not only can she see the rules, but she can also rewrite them. Thus, a game began with the heaven and earth as the chessboard and the fate of all beings as the pawns. Others struggled to survive under the rules, but he turned upside down above the rules. When the confidante and the fateful enemy appeared one by one, Silence smiled lightly: "I changed this rule."