​Experience the depths of a subterranean world in “Roa: The Battle Within.” The all-female knight corps of Queen Gloria clash against the monstrous troop of evil syndicate Zerou in a war that has taken hold of the magical realm. Metzer, a young and brilliant officer of the Zerou, proposes a new plan to his high command, which earns him official approval. His mission: to gain the trust of the Sweet Knights, two Japanese girls bestowed with the power to protect the Earth’s surface from the syndicate’s monsters. Unbeknownst to the Sweet Knights, Metzer has sinister intentions. Watch as he uses his monsters to defeat, kidnap, and brainwash the Sweet Knights into becoming sex slaves devoted to Zerou’s cause. Will Metzer’s grand ambitions succeed or will unforeseen challenges arise? Dive deep into this captivating tale of power, desire, and deceit.​