From JustManga.com:

As the Far East erupts in chaos, a new leader appears in Japan. Caught in the crossfire between Asia and the West, will he be able to lead his country through this crisis?

Fed up with self-serving bureaucrats and ineffective politicians, the Japanese restructure their government. Under their new system, voters will be able to directly elect a Prime Minister with expanded exective powers, who will be, in effect, the first "president of Japan." Sakuragi Kenichiro, a reform minded independent candicate who was educated in America, wins the election. The incumbent Prime Minister, embarrassed at his loss, vows revenge. Just as Sakuragi prepares to tae office, war breaks out in Asia. China, the United States and the other super-powers begin to take sides and execute their strategies, and all sides attempt to use Japan as a pawn. Can Sakuragi implement his reforms while fending off both the entrenched bureaucracy and enemies abroad?