Isao is a university student who hardly goes to the university because he can’t make any friends there. He plays video-games all day. In one morning, when he wakes up, he notices something strange. He looks a mirror and finds out there is a beautiful girl who is nothing like him. Her name is Mari Yoshizaki and she is the one he calls “An angel of a convenience store”. He is somehow in Mari’s body. Isao is trying to spend an ordinary life as Mari. However, Yori, her classmate, finds out she is not Mari though her outlook is Mari. In order to seek the truth, Isao and Yori visit Isao’s apartment but there is Isao and his inside is not Mari. Where has she gone? Can they go back to their bodies?