High schooler Tanukichi Okuma is blackmailed into joining SOX, an underground resistance group founded by Ayame Kajou, in a Japan where a strict law has banned coarse language and any hint of sexual content for over a decade. Enrolled at an elite public morals school under constant surveillance, Tanukichi carries out small acts of obscene rebellion aimed at student council president Anna Nishikinomiya, the girl he has secretly liked since childhood. This manga adaptation follows the story's earlier chapters, ahead of the anime series.