Living in Maison Yabuta, Kaori is suddenly attacked one night by masked men who violently assault her. The incident is concealed by a shadowy organization, and Kaori is gradually subjected to intense training and domination. Eventually, she is reduced to the role of a sex slave. Later, her fiancé visits, only to suffer the same fate, forced to witness firsthand as Kaori is used and humiliated as a mere cumdump for others.