Niina, a tall and graceful newhalf with long, slender legs, makes a stunning entrance. She proudly proclaims her anus a "masterpiece," demonstrating its strength by measuring anal pressure with a vaginal pressure gauge—a rare and unique act. Her results shockingly reach 100mmHg, double that of the average woman. Masturbating primarily through anal stimulation is part of her daily routine, and she constantly trains to perfect her tightness. What fate awaits a man who dares to penetrate her intensely gripping anal cavity?