Venus Versus Virus (ヴィーナス ヴァーサス ヴァイアラス, Vīnasu Vāsasu Vaiarasu) is a manga series created by Atsushi Suzumi which was first serialized on June 27, 2005 in MediaWorks' shōnen manga magazine Dengeki Comic Gao!. The manga ended serialization in Dengeki Comic Gao! on February 27, 2008 due to the magazine's discontinuation, but the manga continued serialization in ASCII Media Works' manga magazine Dengeki Daioh between March 21 and July 26, 2008. Eight bound volumes have been released by ASCII Media Works in Japan. The manga has been licensed for English language distribution by North American–based company Seven Seas Entertainment; the first volume was released in July 2007. Later, a drama CD was created based on the manga series in October 2006. The series has since been adapted into an anime produced by Studio Hibari that aired in Japan between January and March 2007 on BS-i, containing twelve episodes.
Venus Versus Virus revolves around the life of two teenage girls named Sumire Takahana and Lucia Nahashi, who met as Sumire mysteriously discovered Lucia's secrets at the Venus Vanguard, a group who hunts demons called "Virus" led by Lucia's adoptive father Soichiro. Now, while accepting jobs from people who find the Venus Vanguard brochure, they fight off the “Virus” while seeking their true roots and motives, and for that, Lucia finds that Sumire can be a lot more useful than she seems.