Mitsuo Yoshioka, managing director of Yabuta Construction, has disappeared. - Mayu, the daughter of a managing director who works in the secretary's office, searches for her father's whereabouts and ends up at Yamagiri Construction, which turns out to be the Yabuta Group's entertainment sex slave training facility. - Mitsuo was also complicit in the entertainment slave training, but ironically, Mayu also became a sex slave candidate, and Mitsuo, who tried to protect Mayu, became the target of the organization's purge.