"Kneel princess."
Master had a long white soft rope in his hand. I kneeled obediently. He slowly and skillfully wound the rope around me belong my boobs, up between my boobs and back around again, leaving my boobs completely encircled by the strands of rope.
"This is called shinju."
I looked down at my breasts as he pulled the ropes tight and made a knot behind my head. They were tightly bound and firm and full.
"What do you think of your breasts baby?" Master asked me, completing the knot.
"They're wonderful Master" I said softly.
"We're going to hurt you today princess," he said kindly.
I smiled up at my Owner. "Whatever makes you happiest Master."
Master grabbed one of my nipples between his fingers and pulled it, pinching it hard. Then he slipped a tiny rubber band onto the tip of my nipple. My nipple stood encircled by a black rubber band, firm, erect, and proud. It hurt but not too much. He slipped a rubber band onto my other nipple in the same manner.
"You will remove these in ten minutes," he ordered.
Master showed me a handful of pegs. He clipped one on to the right of my nipple. I flinched as it pinched the delicate skin.
"Play with yourself," he ordered.
I put two fingers on my clit and rubbed. The rubber bands on my nipples were starting to hurt. Master placed another clip on my boob. Then as I rubbed, he put more on. Soon my boobs were erect and full and each one had four clips.