White Note Pad

One year ago, high schooler Hana Odamaki (age 17) and auto factory worker Shogo Kine (age 38) suddenly switched places in body and mind. Now, after a year in each other's shoes, the two run into each other again. The man who found himself as a young maiden has brushed up his vessel's femininity and become an amateur model, while the girl in the body of a middle-aged man was treated as an amnesia case and lost any steady employment. They may have been reunited with "themselves", but what should they do when they can scarcely recognize the person they once were...?

(Source: MangaPlaza)