The twins.

"I want to try the twins first," Yoshitika announced, "even though they don't look the same."

"It would be our pleasure," the sisters replied in unison.

He scooped up the girls with ease and carried them over to the king sized bed. The twins giggled when he unceremoniously tossed them onto the bed and then dragged their butts to the edge of the mattress. "Yui lie on top of Shizue," he ordered.

The sisters did what they were told and pressed their soft bodies against each other's, with their large breasts squished into melded globes of flesh. They looked back to watch the tall, muscular gym teacher stand between their outspread slender thighs. All of the women in the room anxiously bit their lower lips as they waited to see which pussy Yoshitika decided to sink his monster cock in first. He rested his huge hands on Yui's plump ass cheeks before nudging the bulbous tip of his cock between the two girls' snatches. The sisters simultaneously let out low moans when his thick, veiny shaft rubbed against their sensitive clits. Dr. Sugimoto and her two remaining nurses observed their patient thrust in and out between the twins' pussy sandwich.

"Who do you think he'll penetrate first?" Ai wondered.

"Shizue," Chiha responded without taking her eyes off of the action before them.

"Yui," the doctor replied. "She is on top so it will be easier for Mr. Saitou to have direct access to her vagina."

"Eeeeeeh," Nurse Ai exclaimed at the doctor's correct diagnosis when Yui stiffened and let out a scream as Yoshitika pushed his cock into her wet snatched.

Shizue held her sister tight, trying to comfort her as her twin tried to adjust to having the trunk-like shaft uncomfortably stretch her cunt abnormally wide apart.

"I... I...," the tanned platinum blonde nurse stuttered as her patient began slowly to move his hips back and forth. "I... am... so... full... of... cock!"

Shoko saw the look of doubt on Chiha's face and gave her a reassuring smile. "It may be uncomfortable at first but the vagina will stretch to accommodate something with a large girth, whether Mr. Saitou's penis or a newborn's head."

Chiha nodded and intently watched Yoshitaka slam Yui's ass repeatedly, causing the girl mewl in excitement after she finally got used to having such a big cock churning in and out of her. The gym teacher continued to hammer the nurse's pussy even after she climaxed.

"Your pussy feels good," he growled, pulling her ass cheeks apart so he could watch his cock piston in and out between her pussy lips.

"OH YES!!!" Yui screamed when she reached her second orgasm.

With her cunt spasming around his cock, Yoshitka grunted and released a torrent of semen into the Yui's womb. After the last spurt he unceremoniously pulled out his still hard cock out of the nurse's cum leaking pussy. "I am still hard," he noted before he rolled the worn-out Yui off of her sister.

Shizue arched her back and let out of cry when he slammed his cock into her cunt in one quick, hard thrust. Grabbing her knees to hold her legs wide apart, he started to stroke in and out of her, which caused her large breasts to jiggle violently. The blonde nurse groaned while she tried to get used to have such an uncomfortably huge cock filling her.

The doctor and the nurses watched as Yoshitka's large bull-size balls loudly slap Shizue's upturn ass while his shaft pistoned in and out of her cunt. They all had been fucked by large penises before although none as big as Yoshitka's massive cock that skewered Shizue. Any doubts and second thoughts they had were mixed by the wet excitement between their thighs.

"Oh oh oh oh," Shizue repeated as her patient accelerated his thrusts to an almost inhuman tempo. She closed her eyes and let her orgasm overwhelm her.

"Your pussy feels good too," he grunted with approval at the sensation of her convulsing cunt around his thick shaft when she climaxed again. Then with a mighty roar, he flooded Shizue's womb with his seed.

The gym teacher pulled his twitching erection out of the nurse and turned towards the other three women. The twins were strewn on the bed, with cum leaking from their redden, swollen snatches, exhausted from being impaled by his monster cock.

"I am still hard, doctor," he sighed in disappointment.