Helena, a woman from the planet Fulcan, which was destroyed by an enemy force known as Akumadar, fled to Earth and has been fighting alongside her brother, Bureiban, to protect her new home. However, after their father's death, she begins uncovering the truth about her origins and her biological relationship with her brother, awakening suppressed emotions. Her feelings for him grow stronger each day, shaken every time he comes to her rescue. Yet, fearing she might disrupt his close bond with his best friend Diana, she keeps her emotions locked away. Then, a devastating event shatters her resolve—her brother is captured by the enemy and left near death. To save him from General Deathbreath, Helena surrenders her body, swearing love to the villain and accepting a vow kiss in front of her helpless brother. Dragged to the enemy base, she is cruelly toyed with by Deathbreath. "You can do whatever you want with my body," Helena declares defiantly. "But my heart will never be yours." Behind her brave words lies deep anguish and humiliation. Blindfolded and violated against her will, she is horrified when a special guest is brought before her—her own brother Bureiban, the one person she never wanted to see her like this. As Deathbreath aggressively stimulates her exposed genitals, she is forced to endure the ultimate degradation in front of him. A time bomb has been planted on her brother—only ten minutes remain. To save his life, Helena mounts Deathbreath, takes his thick cock deep inside her, and begins moving her hips desperately… [BAD END]