To stop the female prisoner Mona's prison escape, Ayumi is ordered to undergo strict re-education. Under the harsh training of the cold and determined instructor, Nana, Ayumi's lips bear not pain but a strange smile. This is no mere repentance—it's a defiant, challenging attitude. Gradually, Nana's rationality is consumed by Ayumi's fervor, and their relationship grows deeper. Inside the cage, a shocking reversal unfolds as punishment and pleasure switch roles between master and servant. A sequel to the previous work "Crimson Cage – Prison of Lilies," this story unfolds with bold new developments.