The tiny off-campus dorm room at Tokyo University felt even smaller on Friday nights. Haruto and his younger sister Aiko had been sharing the space for two months after their parents insisted it was more economical. To everyone else it looked practical. To Haruto and Aiko it was pure torture — and temptation.
Aiko was 20, a psychology major with long straight black hair, smooth porcelain skin, and a petite but dangerously curvy body. Her breasts were full and perky, her ass round and firm from years of dance classes. Haruto, 21, was studying engineering and had always been the quieter, more responsible older brother. Until Aiko decided to change that.
It was past 11 PM. Their roommate had gone home for the weekend. The hallway outside was quiet except for occasional distant laughter from other students. Aiko locked the door, turned off the main light, and left only the small desk lamp glowing with a warm orange hue.
She stood in front of Haruto wearing nothing but an oversized university t-shirt that barely covered her ass. In one hand she held a fresh can of whipped cream. In the other, she dangled a thick, realistic strap-on dildo with a sturdy black harness.
“Onii-chan,” she whispered, her voice sweet but dripping with mischief, “I’ve been wet all day thinking about this.”
Haruto swallowed hard, sitting on the edge of his bed in just boxers. “Aiko… the walls are thin. Someone might hear.”
“That’s why you’re going to be a good brother and stay quiet while I play with you.” She shook the can, the metal ball rattling inside. “Take your boxers off.”
He hesitated only a second before obeying. His cock sprang free, already rock hard and leaking. Aiko smiled, pleased.
She climbed onto the bed and straddled his lap, facing him. “Open your mouth.”
Haruto parted his lips. Aiko sprayed a generous swirl of sweet whipped cream onto her tongue, then leaned in and kissed him deeply, pushing the cream into his mouth with her tongue. They kissed messily, the sweet taste mixing with their saliva as their tongues danced.
When she pulled back, a thin string of cream and spit connected their lips.
“More,” she ordered.
She pulled her t-shirt up and sprayed two thick lines of whipped cream over her breasts, covering her dark pink nipples completely. Haruto leaned forward eagerly, sucking one cream-covered nipple into his mouth. He licked and sucked hungrily, cleaning every drop while Aiko moaned softly and ground her bare pussy against his hard cock.
“Yes… just like that, Onii-chan. Suck your little sister’s tits clean.”
He moved to the other breast, licking every trace of sweetness from her soft skin. Aiko’s breathing grew heavier. She sprayed another line down her flat stomach, stopping just above her smooth, shaved pussy.
Haruto followed the trail with his tongue, licking down her body until he reached her pussy. Aiko sprayed more whipped cream directly onto her swollen clit and slick folds.
“Eat it all, Onii-chan. Lick the cream out of your sister’s pussy.”
Haruto buried his face between her thighs. The sweet whipped cream mixed with her tangy juices created an addictive flavor. He licked long and slow at first, then faster, sucking her clit and pushing his tongue inside her. Aiko held his head with both hands, hips rolling against his mouth.
“Fuck… your tongue feels so good. Deeper. Make your little sister cum on your face.”
She came hard a few minutes later, thighs trembling around his head as she tried to keep her moans quiet. When she recovered, she pushed him onto his back.
“My turn to play with you.”
Aiko shook the can again and covered Haruto’s cock and balls in thick swirls of whipped cream. Then she lowered her mouth and devoured him. She sucked and licked every bit of cream off his shaft, taking him deep into her throat while her hand stroked what her mouth couldn’t reach. The combination of her warm mouth and the melting cream made Haruto groan loudly.
She edged him like that for nearly twenty minutes — bringing him close, then spraying more cream and starting over. By the time she finally stopped, Haruto was desperate, hips bucking, begging with his eyes.
Aiko stood up and stepped into the strap-on harness. She adjusted the thick, veined dildo so it jutted out obscenely from her hips. She sprayed the head generously with whipped cream.
“On your back, legs up, Onii-chan.”
Haruto obeyed, pulling his knees toward his chest. Aiko climbed between his legs and rubbed the cream-covered strap-on head against his tight hole.
“Relax for your little sister,” she whispered, pushing forward slowly.
The thick head popped inside him. Haruto gasped. Aiko kept pushing until most of the dildo was buried in his ass. She stayed still for a moment, letting him adjust, then began to thrust.
The bed creaked softly as she fucked him. She leaned down, spraying more whipped cream on her own breasts so they bounced above his face while she thrust.
“Lick them while I fuck you.”
Haruto licked and sucked her tits as the strap-on moved in and out of him. Aiko picked up speed, fucking him harder, her hips slapping against his ass.
“You love your sister’s strap-on, don’t you?” she panted. “Tell me.”
“I love it… fuck me harder, Aiko…”
She fucked him in missionary for a long time, then made him turn over onto all fours. From behind she had better leverage. She gripped his hips and drove the strap-on deep, reaching around to stroke his cream-slick cock at the same time.
The dorm room was filled with the wet sounds of fucking, heavy breathing, and the occasional hiss of the whipped cream can. Aiko sprayed cream on his back and licked it off while pounding him.
After switching positions multiple times — her riding him with the strap-on while he lay on his back, then spooning — Aiko finally pushed him onto his back again.
She straddled his face in 69, the strap-on dangling over his mouth while she sucked his cock. Haruto licked her pussy and the base of the strap-on while she deepthroated him.
When she felt him getting close, she pulled off and quickly removed the harness. She climbed on top of him in cowgirl and sank her dripping pussy down onto his cock.
“Fill me, Onii-chan. Cum inside your little sister.”
She rode him hard, her tits bouncing. Haruto grabbed her hips and thrust up to meet her. They came together — Aiko first, her pussy clenching around him, then Haruto exploding deep inside her with a long, broken groan.
They stayed connected, kissing softly as their bodies cooled. Whipped cream was smeared across the sheets, their skin, and the bed.
Aiko smiled against his lips.
“Next time we’re doing this in the shared bathroom down the hall.”
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