College student Sakimi Endo's life spirals into chaos after her boyfriend betrays her, leaving her with millions of yen in fraudulent debt. In a desperate attempt to find a way out, she is ensnared by a man named Asamiya, who buys her debt and forces her into servitude at the exclusive Club Canary. Now a captive of the establishment, Sakimi is thrust into a world of high-class prostitution where she must surrender her dignity to survive.
Sakimi and Mana endure brutal abuse under a sadistic manager who uses their traumas to keep them enslaved. After discovering Mana's tragic history and her misplaced sense of guilt, Sakimi determines to rescue her. Following a final, violent confrontation with their captor, the two girls successfully escape their underground prison to seek a new life together.