Midori Days

I love Midori Diaries.

It is a shōnen (Shōnen, a typical boy, from elementary school through junior high school age) 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 (Seiji Sawamura) 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.

Reference:

http://en.wikipedia.org/wiki/Midori_Days

These are 2 end final episodes:

Midori Days - Episode 12 - Part 1/2

Midori Days - Episode 12 - Part 2/2

Midori Days - Episode 13 - Part 1/3

Midori Days - Episode 13 - Part 2/3

Midori Days - Episode 13 - Part 3/3

The end is very happy. When Seiji Sawamura woke up, he recognized that Midori were not appeared on his right-hand. Of course he was sad. Midori came back to her body. He realized how much she loved him, and waited for her to approach him in her real body. She confessed her love for him, and she did not remember days they were together when she was on his hand. He told her that he was in love with her, too. And it snowed. Hihi. So romantic.

After that, it became obvious that they became a couple.

In the manga, however, Seiji admits that he likes Midori, besides looking at all the girls. And the manga ends with them becoming a couple, with Seiji buying a new diary for Midori, after letting her read her old one. It should be noted that she only reads her old diary in a bonus spin-off comic and that scene may not be considered canon.