The way he sharply tugs on the chain, forcing the rings in her nipples to dig against his force and her body weight, makes Yukiko actually cry out for a second before she catches herself, standing on the tips of her toes just for some relief of the pain. She's strong-willed, but even she has her limits.

"I... was born to be a doll," she gasps through the pain. "I was born to be a doll, I was born to be a doll!"

Just make it stop hurting. Please.