Genshiken.

About Genshiken

Genshiken is a Japanese manga series by Shimoku Kio. It was originally serialized in Kodansha's seinen manga magazine Monthly Afternoon from April 2002 to May 2006, and published in nine tankōbon volumes. The manga is about a college club for otaku and their lifestyle. The title is a shortening of the club's official name, Gendai Shikaku Bunka Kenkyūkai (現代視覚文化研究会), or "The Society for the Study of Modern Visual Culture". The series has also been adapted into an anime series directed by Tsutomu Mizushima.