Seitokai no Ichizon (生徒会の一存?) is a collection of Japanese light novels by Sekina Aoi, with illustrations by Kira Inugami. The series started with the release of the first volume on January 19, 2008, and as of 2009, five volumes have been published by Fujimi Shobo under their Fujimi Fantasia Bunko label. A manga adaptation by 10mo started serialization in Fujimi Shobo's shōnen manga magazine Dragon Age Pure on August 20, 2008. Another manga adaptation by Sorahiko Mizushima started serialization in Kadokawa Shoten's Comptiq magazine on May 9, 2009. An anime adaptation will be done by Studio Deen.

Source: Wikipedia