Absolute urethral domination turns Sayoko into total submission. Slowly inserting a thin rod into her narrow urethra, stimulating inside until her face twists in pleasure-pain. Expanding and vibrating the urethra makes her squirt uncontrollably, moans endless. As domination deepens, her urethra becomes hypersensitive, twitching at the slightest touch. Finally flooding deep with thick cum, she falls completely as a pleasure slave.