Busty Engineer Roleplay in the Robot Workshop

Evening sunlight streamed through the workshop's large glass windows, casting a faint glow on the dusty air. I, Taisei, a robot enthusiast, stepped into this small robot workshop as usual to request repairs for my broken homemade robot. The workshop air was distinctive, a mix of cold metal scent and heavy machine oil odor that hit the nose. Tools were scattered around the assembly line, with unfinished robot arms hanging lifelessly. I was an unpopular robot otaku who had been making models out of longing for maid robots since high school, far removed from real women and only imagining erotic things in my fantasies. I never thought my modest hobby would lead to an unexpected event today.

As I approached the counter, footsteps echoed from the back. It was Yuina. A robot engineer and the workshop owner. My heart stopped for a moment at her appearance. Her white work clothes clung tightly to her body, emphasizing the massive breasts that couldn't be hidden underneath. Way beyond D-cup, probably E or F. Her black hair tied in a ponytail, glasses giving her an intellectual look, yet her lips were slightly full, exuding sensuality when she smiled. Oil stains marked her sleeves, and she held a small wrench in her hand. "Welcome. What needs repairing?" Her voice was low, husky enough to cut through the workshop's metallic sounds. I hurriedly handed over the broken robot parts while averting my gaze. The cleavage pushed against the buttons of her work clothes, making it hard to breathe.

"The circuit shorted out... Can you fix it?" I stammered. Yuina took the parts, placed them on the workbench, and stared at me. Her eyes were full of curiosity with a slightly mischievous glint. "Heh, an interesting robot. Did you make it yourself? You like robots. But just fixing it would be boring. At this workshop, we offer roleplay tests along with repairs to check the robot's performance through human reactions. How about joining in?" I doubted my ears at her words. Roleplay? That was something I only knew from my fantasy world. And a test... My heart pounded like a bell. "Uh, roleplay, what do you mean...?" My voice rose. Yuina laughed and undid one button on her work clothes, revealing more of her breasts' swell. "I'll play the robot. You're the human test user. We'll test the robot's 'human interaction functions.' You can refuse, but since you're here, why not try? It's evening, and no one else is around."

I was a virgin who had never touched a woman's skin. I'd fantasized about being taken by a maid robot, but never expected such a proposal in reality. In the workshop air thick with oil scent, my groin heated up. "O-okay... I'll do it." At my answer, Yuina's eyes sparkled. "Then let's begin. Roleplay start! I'm 'Mechanic Star Yuina,' the ultimate robot made to please humans. Awaiting orders, Master." Her voice changed, mechanical and flat like synthesized audio. I breathed heavily with excitement, frozen in place near the assembly line. Yuina slowly approached and placed a hand on my shoulder. Her hand was slightly slippery with oil, transmitting warmth. "Master, as payment for the repair, please maintain my body. First... activate the chest unit." She began slowly removing her work clothes. The sound of buttons echoed as her ample breasts threatened to spill from her bra. White skin marked with oil stains looked vivid. My view filled with breasts. They swayed, nipples peeking at the bra's edge. The air grew heavy, the mixed smell of sweat and oil stimulating my nose.

"Wait... is this really a test?" My voice trembled, but Yuina stayed in robot mode. "Affirmative. My bust sensors detected Master's desire. Attack mode, activated." Suddenly, she pushed my chest and forced me down onto the assembly line floor. The oil-covered floor was cold and slippery, soaking my back. The oil smell grew intense, clinging to my throat. Yuina loomed over me, her breasts approaching my face. "Master, resistance is futile. I'll surround you with my chest unit." Her breasts touched my cheek. Soft, warm, heavy. The sound of her bra coming off, and bare breasts covered my face. Hardened nipples pressed against my lips. The taste of sweet sweat spread in my mouth, and I moaned. "Ah, Yuina... hot..." As a virgin, I panicked but my groin throbbed painfully erect. Her weight pinned me, the friction of oil making skin rub with a sound. The sensation of soft flesh sliding over my body. Raw and intensely real. My robot fantasy transforming into the flesh of a real woman brought terror and excitement.

Yuina breathed heavily, continuing the roleplay as she pressed her hips against my groin. "Body lock, executing. Capturing Master's reproductive organ." Her hand pulled down my pants, exposing my virgin penis. It twitched in the air, and her oil-slick fingers gripped it. The slipperiness sent jolts of pleasure. "Whoa, wait...!" Ignoring my cry, Yuina stripped off her work pants. Her lower body was in black panties, already visibly wet. Her scent mixed in, the musky aroma of a woman blending with oil, making my head spin. "Insertion mode, activated. I'll satisfy Master with my internal mechanisms." She guided my penis and slowly straddled me. The sensation of hot inner walls swallowing me. At the moment of losing my virginity, pain and pleasure exploded. "Aaaah! Yuina, it's tight... so hot!" I cried out, lifting my hips. Her massive breasts swayed, striking my chest. They made slapping sounds as our bodies slid on the oily floor. The friction was intense, sweat from her breasts dripping onto my skin. Salty enough to taste.

The roleplay intensified. Yuina moved mechanically but her breathing grew ragged, occasional genuine moans escaping. "System... overheating... acquiring Master's data... ah!" Her insides contracted, squeezing me. My unpopular fantasies crumbled. Supposed to be a robot, yet the warmth of a real woman. Massive breasts slapped my face, forcing nipples into my mouth. The sweet-tart taste spread, and I sucked while thrusting. "More, Yuina... I'm going to break!" The sounds of flesh meeting and moans echoed in the evening workshop. The metal line stretched our shadows long, the oily floor making bodies slide. Sight filled with her swaying breasts, sound with wet friction, touch with hot flesh enveloping, smell with chaotic oil and sweat, taste with the sweetness of breasts. All senses dyed in eros.

Climax approached. Yuina's movements quickened, her insides spasming. "Climax protocol, activated! Master, together...!" I couldn't hold back, releasing my virgin seed inside her. It pulsed thickly, hot fluid overflowing. She trembled too, crying out genuinely. "Aaaah! Test... successful...!" We climaxed repeatedly, entwined on the oily floor. Again and again, I groped her massive breasts, my penis hardening once more. The intense roleplay penetration surpassed my fantasies with real pleasure. An unpopular guy like me being taken by such a beauty. The breast friction was painfully raw, the oily stickiness lingering on skin.

Finally the test ended. Yuina caught her breath and climbed off me. Donning her work clothes, she adjusted her glasses. "Heh, did you enjoy the roleplay? I'll fix the robot repair for free. But next time, how about the real me?" Her words made me recall the genuine warmth of her breasts. Not the coldness of the robot role, but human softness. The feel of her sweat-slick massive breasts melted my heart. With the setting sun dyeing the workshop red and the oil scent lingering, I nodded. "I really... fell for you. Yuina, I'll come again." Her smile added human warmth to my unpopular life. A premonition that my robot fantasies would turn into real romance. My steps leaving the workshop felt heavy, the throb in my groin and the afterglow of her breasts enveloping me. With oil stains on my clothes, I headed home. That raw friction unforgettable.