From the Anime Limited website:
Akira Takizawa wakes up naked outside the White House with no memories. He's got a gun in one hand, a cell phone in the other, and doesn't know if he's a good guy or one of the worst. He doesn't remember the phone gives him instant access to ten billion yen and a woman who can make his most outlandish requests a reality. He doesn't recall his connection to the ongoing missile attacks terrorizing the Japanese people. Or the part he played in the sudden disappearance of 20,000 shut-ins. He doesn't even remember he's supposed to save Japan and will be murdered if he fails. Whatever it is he's tangled up in, Takizawa's definitely in deep – and that's not even scratching the surface.