Narumi Narutaki launches a secret project called the "Preservation of Japan," aiming to collect prime semen from 100 men to secure the nation's future. He recruits the incredibly naive and innocent Marine to be the vessel for this mission. After receiving explicit training, Marine embarks on her first assignment, discovering her role as a "woman of love and service" while striving to meet the professor's ambitious goal.
Marine successfully seduces the top dancer at the City Boy club, but her mission is soon jeopardized by the arrival of Doctor Marilyn and his creation, South Pole One. A high-performance Sexaroid designed for revenge against Professor Narutaki, South Pole One uses superior robotic capabilities to steal Marine's targets. Determined to protect the "Preservation of Japan" project, Marine challenges the android to a battle to determine who is truly the ultimate provider of love and service.
Doctor Marilyn organizes a high-stakes "jerk-off grand prix," pitting her advanced military Sexaroid, South Pole One, against Narutaki's trainee, Marine Nonohara. Though the robot's mechanical efficiency nearly overwhelms her, Marine finds her second wind by embracing the genuine power of love and service to secure victory. However, the triumph is short-lived as the revelation of the Pentagon's involvement suggests that a much larger conspiracy is looming over the future of Japan.