Strike the Girls [Strike the Blood] (Mitsuki no Mori)

In the Sword Witch Arc, Princess Yukina endures prolonged public humiliation in an underground arena, subjected to relentless sexual torture and forced orgasms. Her captors orchestrate Yuuto's failed rescue into a spectacle of shared torment, forcing him to participate as they break her will. As the ordeal escalates with mechanical devices and gang rape, the torturers declare the true main event has only just begun.