What is "maken-ki!"

is a Japanese manga series by Hiromitsu Takeda. It was published by Fujimi Shobo's magazine Dragon Age Pure, and later Monthly Dragon Age, after the former magazine ceased publishing. It has been adapted into an anime series by AIC that aired on AT-X in the fall of 2011. It is licensed in North America by Funimation as the title Maken-Ki! Battling Venus. Two OVA episodes animated by AIC and Xebec were released from 2012 to 2013. It bundled with the 8th and 11th volumes of the manga respectively. A second season, titled , was animated by Xebec and aired in 2014.