Midori Days (美鳥の日々, Midori no Hibi?) is a shōnen fantasy manga by Kazurou Inoue. It was published by Shogakukan in the magazine Shōnen Sunday from September 2002 until October 2004 and collected in 8 tankōbon volumes. It is licensed in English in North America by VIZ Media and in Singapore by Chuang Yi. The series is about a high school boy who one day finds his right hand replaced with a girl named Midori and his attempts to return her to her real body.

The series was adapted as a 13-episode anime series produced by Studio Pierrot. It aired in Japan between April and June 2004 on the anime television network Animax, who has also broadcasted the series across its networks worldwide, including Southeast Asia, East Asia, South Asia and other regions. It is licensed in North America by Media Blasters.

Source: Wikipedia