In the lawless slum of Amidahara, Rikurou serves as the immortal slave to the powerful Steel Witch Annerose. After surviving a murder attempt by the sadistic demon maid Michiko and receiving mysterious aid from Aishya, Rikurou begins to assert himself through sexual dominance over both Michiko and his unsuspecting master. As tensions rise in the "Dark Neighborhood," Rikurou's bold actions set the stage for a volatile new dynamic within Annerose's household.
Annerose faces off against her rival, Lee Mayfeng, but falls victim to a potent arousal poison that humiliates her and transforms her into a smaller, younger version of herself. Following the encounter, Annerose discovers that her physical transformation has unexpectedly reset her virginity, leading to a passionate reunion with her servant, Rikurou. As they return to their daily lives, the group continues their search for Miki's missing brother while a mysterious sorcerer named Barde emerges with plans to seize the philosopher's stone.
Rikurou and Miki travel to the Crimson Building to seek the guidance of the seer Aish, the Crimson Queen. After Rikurou engages in a ritualistic sexual encounter with Aish to obtain information, a shocking betrayal unfolds. It is revealed that Miki is a puppet for the sorcerer Barde Barde, who used Rikurou to paralyze Aish in order to steal the philosopher's stone embedded in her heart.
The sorcerer Barde Barde executes a sadistic plan to merge Amidahara with the demon realm, beginning with the brutal murder of Aishwarya to obtain the philosopher's stone. After capturing Annerose and Michiko, Barde reveals that Annerose is the vessel required for his ritual. The two women are subjected to horrific torture and sexual violation by demonic creatures, leaving Annerose broken and desperate while Michiko vows to find a way to save her.