Nipple clamps.

The grip of the guards to either side of you digs into your arms. Both of them pull out a nasty looking clamp. You have already been punished enough times to know where those will go. Your nipples stiffen at the sight of them.

"Arrrrrrrrrrrrrrrrrrrrrrgh!" all of you protest aloud as clamps are installed on your nipples.

You and your initiate sisters struggle in the grasp of your captors. The dance of Coraline's large D-cup breasts attracts the attention of your Mistress and she delivers each of them a slap until Coraline stops struggling. She moves to Tess and strikes one of her B-cup tits causing Tess to freeze. Areli and you are smart enough to stop your struggling before receiving a slap of your own. For once you are thankful your modest A-cups don't attract attention.

A low whining sound cuts into the silence. You realize it is the electrodes within the clamps powering up. Goosebumps rise on your skin as you feel a slight charge to the air around you.

"Begin."

Crrrrrrrraaaaaaaaaacccckle! Electricity fires through all of your clamped nipples.

"EEEEEEEEEEeeeeeeeeeeeeeeeeeeerrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrghhhhhhhhhh!"

The sensation is brief, causing the four of you convulse in the arms of the guards. A dull pain lingers and your heart beats impossibly fast. The whining noise emanates from the devices again Fear rises as you wait for the inevitable...

CRRRRAAAAAAAAAAACKLE!

"AAAAAAAAAaaaaaaaaaaaaaaaaacccccck!"

Your jaw clenches and you go rigid under the electric current. The duration is longer this time. Your eyes roll into the back of your head and you give in to the searing sensation through your nipples.

The sensation ends and you shake the stars from your eyes. Your focus returns and you study the other girls. Each is enduring in their own way. Coraline whimpers pitifully. Tess looks to the others nervously. Areli and you rise higher on your knees and attempt to take your punishment with honor. You notice that even the guards are shifting uncomfortably. They must be receiving some of the electric shocks jumping off of your bodies.

Mistress Jade paces watching each of you closely. As your Mistress, she was careful to push all of you to your limits without causing damage. She stops in front of you and chuckles, "What do we have hear?!"

Your cheeks burn when you realize what has caught her attention. Arousal has trickled down your legs.

"Yoshino," Mistress Jade says while tsking her tongue, "you are such a wonderful pain slut. A potential asset in the service of your Master."

"Thank you, my Mistress." you beam under her praise.