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, Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai), 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 Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai: Man**-hen (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 (下ネタ) is a Japanese word for "vulgar slang", "dirty joke," "blue joke," or "erotic topic".