Sailor Frontier is a beautiful girl warrior who transforms using the mystical power of Master Force, an ancient relic passed down from the lost civilization of Lemuria, protecting peace in the city. She has always stood against evil, fighting relentlessly to uphold justice. One day, General Beyond, a high-ranking commander of the Demon Army, launches a terrifying plan to conquer the Frontier world and train its warriors as female obedient slaves. As part of this scheme, he deploys Scorpion Demon, armed with venom containing nanomachines, to attack Frontier from within her own body. Though she briefly escapes and regains freedom, the poison gradually spreads through her system, sapping her strength while simultaneously amplifying her sexual desire uncontrollably. Attempting to fight for justice once more, her poisoned body betrays her—deprived of strength, she ultimately falls under General Beyond's control. As a result, she undergoes complete training as a female slave, surrendering entirely to his domination. This story delivers fan satisfaction with intense battle scenes, stunning transformation sequences, and a shocking finale.