Penguin Musume (Japanese: ペンギン娘, Hepburn: Pengin Musume; lit. "Penguin Girl") is a Japanese manga series written and illustrated by Tetsuya Takahashi. The manga was serialized in the shōnen manga magazine Weekly Shōnen Champion between May 2006 and November 2007. The manga was followed by Penguin Musume Max, serialized in Champion Red from December 2007 to January 2010. An original net animation adaptation titled Penguin Musume Heart was streamed on Nico Nico Douga between April and November 2008. Source: Wikipedia (en)