Prologue

“Huht…!”

Erin slowly closed her eyes and then opened them.

It felt unfamiliar that such a broken voice had come from her own throat. And that wasn’t all.

“Th-this kind of thing…”

The heat that enveloped her entire body, the sensation of sweat dripping off her bare skin—it all felt overwhelmingly stimulating to her. Everywhere moisture touched seemed to bloom with heat.

“This is too much…”

But among everything, the most stimulating was—

“Ah!”

The sensation of her pleasure-shaken body being mercilessly ravaged, licked, and sucked.

It was surely the man’s large hands and lips tormenting her peak, pushing her reason to the edge of a cliff.

“W-wait! Ash!”

“Hold still, Doctor.”

“I-I’ve thought about it, and I really don’t think this is necessary…”

“No.”

His voice, low and growling, pressed her to keep still. And since he spoke so close to her womanhood, his hot breath swept inside.

When she pressed her legs together in chills, his words came back as if scolding her.

“That’s only what you think, Doctor.”

Erin, at a loss, reached her hand between her legs, trying to push away Ash’s head, which was stationed there.

“Ash…”

His ash-colored hair looked even darker in the dim light. Whenever Erin moved her hand, the soft strands slipped through her fingers.

Surprised by how soft his hair was, she flinched, and below, his red eyes met hers seductively.

Flutter.

His long lashes brushed past her mound. Soon, his sharp nose burrowed into her, nudging Erin’s sensitive spot.

“Ah!”

Even such an indecent act seemed excessively beautiful because of how striking the man was, leaving Erin momentarily speechless.

Ash, seeing Erin dazed, gently closed his eyes. Then, removing Erin’s hand that tried to push him away, he placed a kiss on it.

The overly intimate gesture made Erin jump again.

“T-this kind of thing…”

“It’s all necessary. So…”

“Huu…”

“Please don’t move.”

‘You might get hurt.’

He was using polite words, but they sounded like commands in her ears.

Though he always seemed mature for his age, today Ash felt even more like someone above her.

He was her assistant, and she was his Doctor. She was supposed to be the superior.

It was truly strange.

But she had no time to think deeply. Ash pressed his face back into her womanhood.

“Hik!”

As he forcefully parted her legs and explored her sensitive flesh, Erin helplessly yielded below.

His hot, soft tongue traced her sensitive skin, licking deeply. Her overheated body trembled all over.

“Ah, mm…”

Ash soothed her, sucking her womanhood gently. His hand reached up and softly caressed her br*ast.

Despite his oddly dominant attitude and strong grip that rendered her powerless—

His touch was so gentle it felt as if he’d rubbed oil on his skin, sending chills through her.

Feeling his palm kneading her br*ast, Erin thought,

‘Were his hands always this soft?’

She’d never noticed before, always hidden by lab gloves.

Even during previous encounters, she hadn’t paid such close attention, so she hadn’t realized.

Ash’s bare hands, now full around Erin’s br*ast, were large and sturdy, with prominent bones and veins—hands you’d expect from a swordsman, not a researcher sitting at a desk.

Her pink n*pple poked out between his fingers, standing firm.

A clear sign of arousal.

“Mm… mm…”

His forefinger, twisting her peak, wore a ring. Every time the cool metal brushed her sensitive n*pple, she couldn’t help but notice. Erin’s gaze drifted to the ring.

‘…It looks expensive.’

Especially for her own lab assistant.

The ring was thick, and the gemstone set in it was striking—a deep pink stone, almost certainly a ruby.

‘A jeweled ring…’

Even as sweat soaked her hair, Erin wondered,

‘How does he afford something like that?’

At least Erin was self-aware.

She knew her lab’s situation. It was barely above minimum wage, not far from being a sweatshop.

Yet he wore such an expensive item.

‘Ash…’

Maybe he worked for someone else besides her?

Her scattered thoughts were interrupted by the man’s whisper, his face still buried between her legs.

“You stopped moving, so I thought maybe you were finally listening.”

“Mm?”

“Your focus isn’t great today, Doctor.”

“Huu, ah…”

His tongue scolded her, flicking inside. No longer just licking her outer skin, his tongue pressed into her folds and rolled over her cl*toris, making Erin jump as if burned.

“Wait, wait… That’s too…”

“You shouldn’t try to rush through something this important.”

“I-I’m not rushing…”

“And lying is even worse.”

With those words, Ash flicked her cl*toris as if punishing her.

“Ah!”

A surge of pleasure made Erin’s head fall back. Her body tensed, and she felt something gush out below.

Flushed with embarrassment, Erin’s face turned red.

“Huu, huu, d-don’t…”

“If you’d just focus, I wouldn’t have to do this, Doctor.”

Ash let out a raspy sigh, letting it settle deep inside her.

As Erin flinched, he lightly tapped her thigh, then bit gently into her soft skin before speaking again.

“Still, it’s not bad.”

“W-what…?”

“You’re so wet and sensitive.”

“…”

“So I doubt we need any more prep.”

His blunt words left Erin speechless.

Soon, Ash lifted his head. What she saw next left her even more stunned.

“…”

Ash’s face, lips curled in a smile, was drenched. She didn’t need to ask what he was wet with.

Even as she bit her lip in shame, Erin couldn’t look away from Ash’s face.

His eyes, beneath damp bangs, were even more sensual. His face, soaked with her fluids, looked almost too er*tic.

Blink.

Each time his delicate eyes blinked, drops clung to his long lashes and fell.

When one drop traced his lips in a graceful arc…

Slick.

Ash stuck out his tongue and licked his lips without hesitation. Erin shivered. Seeing such a sensual sight made her own body burn even hotter.

“I always think this, but you taste sweeter than I expect, Doctor.”

“D-don’t say things like that…”

“Well. That’s not what’s important right now.”

With that, Ash casually sat up, unbuckled his pants, and pulled out what had been trapped inside.

Thud. It sprang up, catching her eyes.

Gulp.

Erin subconsciously swallowed at the sight of his intimidating member.

Despite his delicate, sensitive-looking face, his shaft was thick and veined. It always looked far too much to fit inside her.

But she knew well how easily it could enter, and how much seed it could spill inside her.

Her heated body involuntarily clenched, and Ash, noticing, gave a wicked smile.

“You don’t need to beg, I’ll put it in, Doctor.”

“T-that’s…”

“And I’ll fill you up.”

As he said that, Ash stroked her lower belly and rubbed the tip of his thick member against her womanhood.

He brushed teasingly along her entrance, circling her cl*toris with his shaft, making Erin twitch repeatedly. Anticipating penetration, her thighs grew slick.

“Huu, huuu…”

“So don’t worry.”

“A-Ash…”

“You don’t have to squeeze so desperately. All my seed is for you, Doctor.”

“Don’t say things like that!”

“But Doctor, isn’t that our contract?”

Ash smiled, grabbing her trembling, round br*ast.

Apparently satisfied with the soft feel, he sighed languidly, licked his lips, and whispered,

“Until you get pregnant, I’ll keep filling you.”

Startled, Erin quickly shook her head.

‘What is he saying?!’

“O-our contract wasn’t like that…”

“I’ll keep going, keep filling you, until you’re carrying my child.”

“N-no…”

“Oh. Was that not what you wanted?”

With that, Ash spread Erin’s thighs and lifted her legs over his shoulders.

Slick, slick. His shaft, rubbing against her belly and womanhood, lined up with her entrance.