Shimoneta to Iu Gainen ga Sonzai shinai Taikutsu na Sekai: Manmaru-hen  

A Boring World Where the Concept of "Dirty Jokes" Does Not Exist, 下ネタという概念が存在しない退屈な世界 マン●篇

In sixteen years since the "Law for Public Order and Morals in Healthy Child-Raising" was enacted, which prohibited coarse language in the country, Tanukichi Okuma joins the leading elite public morals school. Soon after, he is invited to join the Anti-Societal Organization (SOX) by its founder Ayame Kajou. As a member of SOX, Tanukichi is blackmailed into participating in obscene acts of terrorism against Anna, whom he has feelings for.