Kanna Haruhiko (male), for reasons unknown to him, is suddenly turned into a girl.

He returns to his male form some time afterwards, but with the continuing cycles between turning into a girl and then back to a guy, he is bewildered by the differences in both physical aspects and ways to communicate with other people.

Plus the abrupt changes that happen to his relationship with other people including his best friend and his childhood friend.

A dramatically depicted story about men and women...