Sayuri, who works as a teacher, visited the home of Yusei, a student who refuses to go to school. However, she was welcomed by Yusei's father, Kōji, and his brother, Noboru. Kōji put her in a stupor and offered her to Yusei. Yusei, along with Kōji, who is a yakuza, were involved in nefarious schemes. That night, Kōji's colleague, Kudo, and his subordinate, Nakata, came. Kōji made the worst proposal to Kudo, suggesting to push Sayuri into the dark world of the sex industry...
