別冊少年マガジン
is a Japanese manga series written and illustrated by Shūzō Oshimi. It was serialized in Kodansha's "Bessatsu Shōnen Magazine" between September 2009 and May 2014. The story follows a middle school student named Takao Kasuga who's forced into a "contract" by fellow student Sawa Nakamura, after being caught stealing the gym clothes of his crush Nanako Saeki, and the series of events afterwards that follow these three characters. The title of the manga comes from Charles Baudelaire's "Les Fleurs du Mal".