Kerri gasped and threw her head back in agonizing pleasure.

"Bonus question," Hayato whispered into her ear, "what's 300 squared multiplied by 600 squared?"

Kerri cried out as his fingers moved in and out of her moist crevice. Their study sessions were becoming incredibly painful, but not from boredom. It had been three hours since their study session had started and her 'test' had started only one hour ago. Since her test had started she had been driven to orgasm over eight times.

She was becoming numb but the more he touched her the more she wanted him. She was dripping wet and Hayato's left hand was drenched in the essence of her.

"I-I can't," she whimpered, "I can't think if you do this to me-Hayato!"

"You have to answer or you won't get your reward." Kerri felt tears fall from her eyes as another orgasm shook her body. She keened and bent forward as yet another orgasm washed through her. She tried to pull his hand away from her and squirmed to get away from him but nothing worked.

Hayato sighed and placed the book down on her desk and then used his other hand to unbutton her shirt and pull her bra down to exposed her bountiful breasts. His lips found the nape of her neck and teased the sensitive skin.

"The-the answer is 32,400,000,000!"

When she revealed the answer to the question his hands stopped moving momentarily and suddenly she was laying on her desk. Her chest was pressed harshly against a nearby table and her cheek was pressed against the cool wood.

Then she felt it. The hard and hot flesh at her entrance, the rhythm of her heart picked up immediately. She had given him the correct answer and now she was getting her reward. The excitement was overwhelming. Soon she would have the feeling of him thrusting in and out of her. The thought itself was overwhelming. Slowly he slipped into her and she gave out a cry. It felt so good. Her tight walls pulsing against his penis felt breathtakingly pleasurable. His thrusts started out slow then soon he was pounding harshly into her convulsing core.

Kerri cried out loudly as an approaching orgasm began to build. His own hands gripped her hips, pulling her toward him so he could get closer.

Hayato threw back his head, pulling her hips harder on his throbbing organ. The relentless beating was taking its toll on her already abused crevice. She could barely breathe, sweat was covering her from head to toe, and she was screaming out his name was involuntarily.

The pit of her stomach tightened, pulled and twisted into hard knots. Kerri cried out louder, nearing her limit and his thrusts become more frantic, stronger, and it nearly knocked away her vision.

"Hayato! Yes, Hayato!" Kerri's back arched and her nails dug into some nearby papers that were under her. Her cries echoed around in her room and his own grunting and groaning mingled with hers. Suddenly it felt as if her body was on fire and that was it.

Her version sparked till it turned white, and she felt something wet slid from her core and down both of her legs. He gave a strained cry when her core tightened around him but Hayato continued to pound into her, bringing her higher than before.

"Shit," Hayato muttered as his thrusts became sloppy but he still picked up speed. He lurched forward, bracing himself, and her core continued to convulse violently, already pass euphoria, she couldn't take anymore. After what felt like the hundredth orgasm that afternoon she had fell weak on the desk. She panted harshly until his body stilled, hips shaking as he reached his own climax and his lips moaned silently.

As she slid from the desk and on to the floor the only thing she could think about was how much she loved to pass the tests he gave her.