Sayuri, who works as a teacher, visited the home of Yusei, a student who refuses to go to school. However, it was Yusei's father Koji and his younger brother Taku who welcomed her. Koji put Sayuri in a comatose state and handed her over to Yusei. Yusei, along with the yakuza member Koji, engaged in shady dealings. That night, Koji's colleague Kudo and his subordinate Nakata arrived. Koji suggested to Kudo that they might as well push Sayuri into the underground sex industry...
