Saito Kazuo class star of day, where he classes to a transfer student Saito, an America , the one the United States is Kazuo childhood childhood playmate .
After school, one husband and one America on the way home , accidents from the stone steps with drop down two people to exchange the body . Kazuo 's body is a beautiful soul , a body is the soul of Kazuo .
Detects anything abnormal persons, while thinking about the way to quickly change back , side to cope with each other's living environment ... knew the heart of the two slowly approaching .
Finally, the two are afraid of things happened. Kazuo one due to job changes, had to leave Onomichi .