Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai: Man**-henShimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai: Man●hen; A Boring World Where the Concept of Dirty Jokes Doesn't Exist; Shimoneta - Manmaru Hen; Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai - Man*hen; Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai - Manmaru Hen; Shimoseka; 下ネタという概念が存在しない退屈な世界 マン●篇

Set 16 years after the "Law for Public Order and Morals in Healthy Child-Raising" banned coarse language in the country. Tanukichi Okuma enrolls in the country's leading elite public morals school and is soon invited into the Anti-Societal Organization (SOX) by its founder, Ayame Kajō. As a member blackmailed into joining by Ayame, Tanukichi ends up taking part in obscene acts of terrorism against the talented student council president Anna (for whom Tanukichi has a crush).