Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai

Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai summary:

A girl shouts “p****” while running through the train station. In that instant, I fall flat on my face.
After the enactment of the Public Morality and Wholesome Upbringing Law sixteen years ago, all s.e.xual words have been lost in j.a.pan. Ok.u.ma Tanukichi has entered one of the few schools with excellent public morals where his beloved uppercla.s.sman Anna serves as student council president. However, an obscene terrorist going by the name Blue Snowfield blackmails him into joining SOX, an obscene terrorist organization! Is this a prison or is it a harem?