puzzle with an endurance test

Akane led Naruko to a small table that had a hundred piece puzzle on it. she tied Naruko's leash to the table before stepping away. she returned with a pole that cuffs on a flat bottom on one end and a large dildo on the other end. she set the bottom down and cuffed both of Naruko's ankles to it. she then raised the pole till the dildo fully entered Naruko's pussy.

"I'll explain the rules before I fully restrain you," said Akane. "in front of you is a hundred piece puzzle and a vibrating dildo in your pussy. right now it is off but for every ten pieces you put together I will raise its setting by one. if you take longer then thirty minutes I will automatically raise the setting to ten. If you cum then the game is over. you will be rewarded for progress past a certain point but it ill be much better to finish the puzzle. now would you to use any of your rewards from the bike challenge.

"um mistress how would my arms be restrained," Naruko asks.

"good you asked rather than just picking one," said Akane. "you will only have one hand free that i will let you choose. the other will be cuffed behind your back."

Naruko thought about it for a moment before saying, "I wont use any rewards mistress."

"okay which arm will be your puzzle arm," Akane asks. Naruko raises her right arm. taking her left arm she puts one end of the cuffs on her left wrist. she then grabbed a small belt and wrapped it around Naruko's waist before cuffing the other end of the cuffs to a small ring in the back of the belt. she then pulled out a bit gag and said," open up." she then placed the gag in Naruko's mouth and secured it behind her head.

she then stepped away and said," your time starts now."