In ancient times, the goddess who sealed away the powerful demon Giger entrusted the remnants of her power into twelve sacred stones, passing them to maidens of the future. Over time, Giger achieved spiritual resurrection and sought to regain his physical form by reclaiming the goddess's power stones, summoning his former enemies—the monsters Ulgyas and Estazara—back into the world. Ulgyas absorbs women's excitement to grow stronger, while simultaneously returning that energy to induce a potent aphrodisiac effect. Estazara, on the other hand, thrives on torture, wielding superior intellect and scientific prowess to psychologically dominate her victims. Their first target is a Charge Mermaid battling the Polar Star Legion Ozma. Under the relentless assault of Ulgyas and Estazara, she is pushed to her physical and mental limits, ultimately succumbing to their overwhelming power. This story captures the intense struggle of a young heroine facing off against villainous foes, delivering fierce combat and escalating passion.