Shimoneta: A Boring World Where the Concept of Dirty Jokes Doesn't Exist (下ネタという概念が存在しない退屈な世界), officially abbreviated as Shimoseka (下セカ) in Japan, is a Japanese light novel series written by Hirotaka Akagi and illustrated by Eito Shimotsuki. Shogakukan published eleven volumes under their Gagaga Bunko imprint. A manga adaptation titled A Boring World Where the Concept of Dirty Jokes Does Not Exist: The Cunt Edition (下ネタという概念が存在しない退屈な世界 マン●篇) with art by Yuzuki N' was serialized in Mag Garden's shōnen manga magazine Monthly Comic Blade from March 2014 to February 2016. An anime television series adaptation by J.C.Staff aired from July to September 2015. Shimoneta is a Japanese word for dirty joke.
Plot
In the dystopian future of 2030, the Japanese government is cracking down on any perceived immoral activity from using risqué language to distributing lewd materials in the country, to the point where all citizens are forced to wear high-tech devices called Peace Makers (PM) at all times that analyze every spoken word and hand motions for any action that could break the law. A new high school student named Tanukichi Okuma enters the country's leading elite "public morals school" to reunite with his crush and student council president, Anna Nishikinomiya. However, Tanukichi quickly finds himself entwined with the perverted terrorist "Blue Snow" ("Tundra's Blue" in some translations) when she kidnaps and forces him to join her organization, "SOX", in creating and spreading pornographic material across the city as a form of protest against the regulations.