Penguin Musume (, Pengin Musume, lit. Penguin Girl) is a Japanese manga series, written by manga author Tetsuya Takahashi. The manga was serialized in the Japanese shōnen manga magazine Weekly Shōnen Champion between 2006 and 2007. After the manga ended serialization in Weekly Shōnen Champion, the serialization was restarted from the February 2008 issue of Champion Red magazine with the Penguin Musume Max title. An original net animation adaptation entitled Penguin Musume Heart (Pengin Musume ♥ Hāto) was streamed on Nico Nico Douga between April 19, 2008 and November 25, 2008.