Busty Researcher Gives Anilingus to Lab Assistant in Midnight Heat

A summer night in the research lab feels like a steam bath. Outside it's still muggy, and the weak air conditioning leaves my T-shirt soaked through. The clock has passed 2 AM. I'm Soma, just a research assistant staying late to help senior Rei from the biology department. Rei is a grad student whose ample breasts are an open secret around the lab. Actually, not much of a secret—everyone stares. Those curves swelling under her lab coat sway like twin melons, pinning the gaze of a virgin like me.

The hallway is silent except for the fluorescent lights' hum. Rei calls me into her private booth, her small personal room. I knock and hear her bright voice: "Soma, come in!" Inside, she's at the desk, eyes sparkling behind her glasses. Because of the heat, her hair is in a ponytail with sweat glistening on her neck. One button of her coat is undone, flashing cleavage that makes my heart pound. "Sorry for the late hour. I need help with urgent data processing. I really rely on your calculation skills," she says with a smile. A sweet shampoo scent drifts over, and my lower body twitches in response.

Introduction: Encounter and the stir of anticipation

We dive straight into work. The booth is cramped; sitting beside her, I feel her body heat. The humid summer air mixes with her feminine scent leaking from the coat, making my head spin. The monitor's pale light illuminates her damp lips. During the task she occasionally touches my shoulder. "Can you enter it here?" Her fingertips are warm, and my imagination runs wild. Being touched by a busty beauty like Rei is something that never happens in my usual life. The data concerns biological nerve responses, apparently involving experiments around anal sensation. For some reason, the depths of my rear start to itch.

"Soma, tired? Let's take a break," Rei suddenly stands. Her breasts sway, lace from her bra peeking through the coat's gap. I quickly look away, though my mind is already in chaos. "No, I'm fine," I answer, my voice cracking. Rei takes a bottle from the shelf. "This is experimental lubricant. I'd like you to try it." My mind freezes. She laughs. "Not a joke. Serious data collection. It's night, so private. Will you cooperate?" Her eyes gleam mischievously. I can only nod. No way a virgin like me could refuse this situation. My rear hole begins to twitch with anticipation.

Development: Unfolding and unknown temptation

Rei locks the booth door and draws the curtain. The room suddenly feels sealed, the air even hotter. She points to the simple bench used as a bed. "Get on all fours. Relax." My heart feels ready to explode. Sweat coats my back from the summer heat; she removes my T-shirt, leaving me half-naked. Her hand on my waist sends an electric jolt. She moves behind me and slowly pulls down my pants. "Good boy. It's for science," she whispers sweetly in my ear. With my rear exposed, the cool air from the AC hits my skin, sending shivers. Embarrassment burns my face, yet excitement makes my cock throb hard.

"Let's begin," Rei says, spreading my cheeks with both hands. Her fingers feel soft yet firm. Summer humidity leaves the cleft slick with sweat. Her breath alone makes my virgin hole contract. "Wow, such a pretty pink. Just as the data suggested," she observes. Embarrassed, I mutter, "Rei, this feels strange," but my voice trembles. The next moment her tongue touches my anus. That slippery, wet sensation! Warm, soft, an unbelievable pleasure shoots up my spine from deep inside. "Whoa, what is this!" I cry out. Rei chuckles. "Relax. I'm stimulating with my tongue. I'll record the nerve response."

Her tongue explores. At first lightly, tracing the rim. My cheeks quiver, and the salty taste of sweat mixes in her mouth, producing occasional wet sounds. My vision blurs, the monitor light flickering. My sense of smell fills with her shampoo and my sweat, creating a primal scent. Rei's heavy breasts brush my thighs, an unbearable sensation. Her coat has fallen open, the soft mounds stroking my skin. Her tongue pushes deeper, that slick intrusion! My virgin hole awakens to unknown pleasure. The ache won't stop. "Ah, Rei, this is too much…" I moan. She answers in scientific mode, "Heh, interesting reaction. Excitement hormones are spiking," while rotating her tongue. Heat builds deep inside, spreading like electricity. My cock leaks precum, glistening at the tip and pulsing untouched.

My imagination races. I've only seen this in adult videos, yet here Rei’s tongue is actually licking my dirty hole! To put it crudely, my rear is soaked in her saliva. Added summer sweat improves the glide. Her hot breath sometimes lets teeth graze lightly, a mix of discomfort and pleasure. Mentally I'm already melting. Her hands knead my cheeks, nails digging slightly. "Let me spread you more," she says, adding fingers to push her tongue deeper. My mind goes blank in a vortex of pleasure. Conversation breaks into fragments. "Rei… more…" I end up begging. "Of course, experiment continues. I want your limit data," she replies, voice excited. Her breasts press against my back, their softness sinking in. Even without sight, I feel the hardness of her nipples through touch.

The pace accelerates. Rei lifts her tongue briefly. "Now fingers," she says, but I'm already past control. At the peak of arousal I reach down and grip my cock. It's rock-hard, veins standing out. Stroking doubles the pleasure. The link between anus and cock melts my brain. Rei watches and laughs, "Voluntary stimulation? Fascinating." Her tongue returns to my hole. Wet sounds echo in the room, embarrassing yet intensely arousing. In the quiet summer night those vulgar noises reverberate erotically. My sweat drips onto her face; her breathing grows ragged. "Soma, you're so hot…"

Climax: Peak and explosive release

Pleasure reaches its zenith. Rei's tongue moves vigorously, licking every part of my anus. It delves deep, tickling the inner walls. My hole throbs and contracts repeatedly. "Ugh, Rei, I'm coming…!" I shout. My hand strokes furiously, precum trailing in strings. My imagination explodes; I reach for her breasts, grabbing them through the coat. Soft, heavy, sinking under my fingers. Their weight fills my palms. Rei gasps, "Kyaa, Soma!" but doesn't stop. Instead she cries excitedly, "The data is incredible!" My fingers slide into her cleavage, pinching her nipples through the bra. They are firm and springy.

The moment of climax arrives. Electricity surges from deep inside, convulsing my whole body. My anus clamps around her tongue as thick white semen erupts from my cock. Spurts land on the bench. Hot fluid hits my thighs, mixing with summer sweat into a sticky mess. Vision whites out. I hear Rei's voice near my ear: "Wow, so much…" The scent is a mix of raw semen and her sweet-tart sweat. I collapse, gasping. Aftershocks leave my hole still twitching. Rei pulls her face away and adjusts her glasses, lips carrying my scent, looking wicked.

Conclusion: Afterglow and the promise of new experiments

After release the room falls quiet. A night breeze slips through the curtain; the AC hum sounds distant. I sit slumped on the bench and look at Rei. She jots notes. Her breasts still threaten to spill from the coat, drawing my gaze. "Soma, wonderful data. The virgin anal response showed far more arousal than predicted. Hormone levels spiked, and ejaculate volume was double the average," she analyzes scientifically. Her tone stays calm, yet her cheeks are flushed. Still dazed, I ask, "Rei, was that… really an experiment?" She smiles. "Of course. But it was fun, right? Let's run more tests. Next we'll try fingers, pushing your limits." Her eyes shine as she glances at my cock.

The afterglow lingers in my body. My rear aches pleasantly, a comfortable fatigue. Rei's hand touches my shoulder. "Good work. The summer night is still young." I can't forget the feel of her breasts; my imagination begins racing again. Outside, cicadas sing and the summer heat continues. I know this event has opened a new chapter in my life. The memory of Rei's breasts and tongue is burned into my mind. What experiment next? Just thinking about it makes my cock stir once more.