One morning, when the protagonist woke up as usual, he found that the house next door was Whitehouse. And his next door childhood friend became the president of Japan.
An alien came to the earth to establish diplomatic relations with the earth.
But the spaceship fell down on the official residence of the ministers and killed them by accident.
So, the alien put a girl up for the president instead of them and brainwashed all the Japanese.That girl is a childhood friend of the protagonist.
But the alien didn't know about Japan well. She eatablished presidential system by mistake.
The protagonist becomes the vice-president and supports the president, trying to get back the former Japan.
