Perversion Mania Headquarters presents a documentary-style work following actress Ryo, an anal enthusiast, on her four-day journey toward fulfilling her dream of becoming an anal fist queen. On the first day, Sunday, the process begins with a single finger inserted anally to help relax her anus. Highly sensitive, Ryo reacts intensely to even the slightest stimulation, eventually squirting from anal pleasure alone. Her reactions are captured in meticulous detail, creating a compelling blend of documentary realism and erotic allure.