[A Scientist's Weakspot] Ishigami Senkū x Reader

[🍋] Chapter 8: A birthday present

His body pressed against hers, hot breath tickling her skin as she lets out a soft mewl. From her suggestion, it made his body move without thinking, pinning her wrists above her head on the bed.

"S-Senkū?"

"Kukuku~ Is Y/N now regretting what she said?"

"I-I mean..."

Hot searing lips grazed her neck before his teeth sunk down into her skin, leaving an apparent red mark. Even though the two were inexperienced, he very well knew that she was getting turned on. Y/N's legs rubbed against each other and her pants grew heavy. He slipped his slender fingers underneath her dress, pulling them off to reveal her naked glory. Her arms covered her intimate parts, embarrassed at her display. Since it was not the modern world, she did not have a bra to cover her breasts, just a flimsy piece of cloth to cover her heat. Her juice seeped through the fabric, making it clear that she was ready for him. 

"I-I can't be the only one naked, r-right?!"

His lips twitched, pulling his clothes over his head. Senkū's body wasn't as built as Magma's but there was a slight definition of muscles that developed over time. His hands grabbed her wrists, pushing her arms away from her breasts. Y/N's nipples hardened at the touch of cold wind and he chuckled, finding the way her body reacted cute. He nibbles onto her skin, grazing her with his teeth and kisses down her naked skin with love.

"H-Hnn~ S-Senkū."

Her legs were pushed apart by his hands and he pulls away from the cloth that hid her intimate part. It glistened under the moonlight, waiting for any form of pleasure. Senkū's index and middle finger spread her folds, her sticky juices connecting and sounding a lewd wet sound. He rubs her vulva, stroking and flicking her clit as he goes up and down. Y/N squirmed as soft moans came out from her pink lips.

"Kukuku~ This may be a better present than I thought."

"Ahnn~"

He inserts two fingers, scissoring as the digits thrust in and out. 

"W-Wait, S-Senkū! Hnn~"

Just a few simple thrusts from his fingers made her cum. Her body stiffened and essence coated his hands. She panted heavily, sitting up to push him down.

"Y-Y/N."

She faced his tent, pulling down the fabric that restricted it. His dick sprung up almost immediately and she flushed at the sight. Veins decorated the shaft as it slicks itself with precum. Y/N could smell the erotic arousal as she drew nearer, licking from base to tip, making him shudder.

"H-Hnn~ Y-Y/N~"

Her lips sucked onto his tip before her jaws opened to engulf him in her oral cavity. She gagged as his dick hit the back of her throat. She bobs up and down, gaining low groans from him. Her tongue swirled around his hardening rod as she made eye contact with the pleasured male. He sat up slightly, pushing a few stray hair behind her ear as she sucked on him. 

"I-I'm cumming~"

Y/N pushes her nose as close as possible to his skin, the feeling of his hot cum trickling down her throat. As she pulls away, her lips hollowed to suck every single drop of cum. The moonlight shone behind her naked body as she swallowed his semen and wiped the saliva that coated her chin.

"I-I'm all yours, Senkū~"

She was like a goddess the village named her. He was entranced by her beauty under the moonlight, making his body move instinctively. Her body landed onto the while he hovered over her, panting heavily in heat. Senkū rubbed his shaft between her folds, positioning in front of her entrance.

"Tell me to stop if it hurts too much, okay?"

"Okay~"

His hips moved forwards, sheathing through the tight entrance. The tip of his dick could feel the restraint, a whine of pain coming out from her lips.

"C-Continue~ Hnn!"

Senkū was a newbie, heart worrying for the pain on her face. His hand cupped her cheeks that were stained with tears but her lips curled up in a soft smile, telling him to continue. He pushes and pushes, a sharp snap and skin slap showing that he was all in.

"I-I'm all in, Y/N...Ahh~"

"M-Move. P-please~"

He obeyed, thrusting in and out of her as she screamed in pleasure. The voice that was once gentle and soft became loud and lewd. Y/N screamed his name and moaned in pleasure from his dick hitting her sweet spot.

"S-Senkū~ Hnn! AhH~"

The walls that clenched around was soft and warm, the amazing feeling that he never once expected himself to experience because he was a science freak that only cared about science. When she came into his life, he experienced many new things outside of science. 

"S-Shit, Y/N~ Ah!"

Their skin slapped against each other, accompanying their moaning duet. He felt his dick throb, on the verge of cumming. Senkū pulls out and his cum spurted out all over her stomach that rose and fell from her panting. She smiled at him, hands reaching for him to hug her. He gladly did, cuddling together as they fell asleep.

"Y/N, this was the best birthday present...Hah..."

He snuggled up to her like a cat, making her giggle from the ticklish sensation. No one knew that the scientist Senkū had such primative instincts. That night, the village heard the blissful cries of their goddess and the animalistic grunts of the scientist.