Happy Happy Clover

is a Shōjo manga series created and illustrated by Tatsuyama Sayuri, serialized in Shogakukan's shōjo magazine Ciao in August 2005 to November 2008. Five tankōbon Volumes were serialized in April 2006 to November 2008. An anime adaptation ran from July 6, 2007 to 28 September 2007, adapting some of the chapters of the manga series. Viz Media currently holds the License for the Manga series.

Plot
Clover is a rabbit living in Crescent Forest with her friends Kale and Shallot. One day when Clover is late for school, Kale makes fun of her for being late. The same day, Professor Hoot announces the arrival of a new student: Mallow. The four bunnies travel all over Crescent Forest getting into (and out of) trouble.

Other Sources

 * Happy Happy Clover
 * Happy Happy Clover Manga on AnimeNewsNetwork
 * Happy Happy Clover Anime on AnimeNewsNetwork