Chapter 9

‘This… this is strange.’

It felt as if Erin was falling from a great height without a rope, the sensation crashing down onto her head over and over.

“A-Ash, Ash…!”

Huff!

Her chest, soft and pale like a loaf of bread, shook as her ribcage expanded. Erin unconsciously shook her head.

“T-That’s enough, it’s too much…!”

Even as she protested, Ash’s lips only sucked harder, several times more intensely.

“Ah!”

With a short cry, Erin was drenched below.

“……!”

Her mouth hung open, but after that first scream, nothing else came out. All she could feel was a tingling sensation that numbed her whole body and broke every thread of thought. The shock of her first climax was unfamiliar.

Because of that, Erin realized a little late what was now touching her down there.

“Uh, mm…?”

Thick and hot, rubbing up between her folds.

At first, she thought it was like a club…

“A-Ash!”

It was Ash’s aroused lower half.

Erin couldn’t look away from Ash’s member. She realized her pupils were trembling uncontrollably, but her gaze wouldn’t obey her will.

Contrary to his angelic beauty, the intimidating, arm-thick thing seemed almost impossible to imagine hidden away. Veins stood out fiercely along the shaft, which curved slightly. From the head, as big as a child’s fist, a slow drip of viscous liquid fell directly onto Erin’s cl*toris.

It was an intensely provocative sight and feeling.

‘That… that thing…’

Was that really going to go inside her?

Reality faded as Erin stared in a daze.

“Huff, ah!”

The tip of Ash’s member, bold and insistent, pressed between her folds, slowly forcing its way in with a sense of pressure.

“A-Ash! Wait!”

Erin, not yet mentally prepared, instinctively reached for Ash’s shoulder. The heat at her entrance made her flinch and raise her head.

“…….”

Then—

Erin was struck speechless.

“…I’m sorry, Doctor.”

Ash’s red eyes were filled with burning passion, glazed as if tears could fall at any moment.

‘I’ve never seen Ash’s eyes like this before.’

No matter what she did, he had always been rational, treating her like a foolish younger sister. But now, his gaze was filled with her, ready to boil over.

Erin’s lips moved soundlessly as she touched Ash’s firm body, and he let out a long, mixed sigh of satisfaction and desire.

“…I want to go slowly, but—”

With slow words, Ash’s body pressed inside bit by bit. Erin’s body jerked unconsciously, and Ash pressed his whole body against hers, holding her firmly.

The heat between their bodies, more than the pressure below, set Erin’s chest aflame.

“A-Ash…”

The warmth bloomed between their tightly joined bodies. Erin shivered as sweat trickled between their pressed skin.

‘His body…’

Was it always this big and warm?

As if hypnotized, she reached up and wrapped her arms around Ash’s neck.

“I’m sorry, Doctor.”

“Huh?”

“I’ve been holding back for too long.”

Huh?

Before she could process it, Erin heard the sound of Ash’s teeth grinding.

Then, a wave of pressure crashed over her, and Erin opened her mouth, crying out.

“Ah, ahh, huff!”

“Ugh…”

The penetration was so intense it brought tears to her eyes.

“A-Ash, Ash…”

“It’s okay…”

“I don’t think it’ll all fit, it won’t go in…”

“You can do it, Doctor.”

“Huff…”

As she whimpered, Ash pressed a long kiss to her temple and whispered gently.

“You want to see results from this experiment, don’t you?”

Those words brought her focus back. Right. The experiment.

“You’ve worked so hard, you can’t give up now.”

‘That’s right. He’s right.’

She needed results… results…

“I’ll finish inside you…”

‘Ash, inside me…’

He had to release inside.

Just thinking that sent a bolt of excitement through Erin’s mind. She realized how expl*cit and direct these words were.

To finish inside… To have him release inside her… It was a crude, er*tic thought.

Yet, the words only made her feel hotter inside.

Seeming to notice, Ash leaned down and whispered,

“Even if I release everything inside, you won’t get pregnant.”

“Ah, mm!”

“We need to prove it.”

At those words, Erin instinctively spread her legs wider.

The embarrassment she’d felt moments before faded beneath the heat and Ash’s whispered purpose.

“Huff!”

Ash’s member pierced deep inside, making its presence known in her lower belly. The way it grew and throbbed inside was overwhelming, and Erin’s head filled with heat.

“Huff, mm…!”

Her whole body burned and ached, and then her vision went white.

The sensation of him stretching her, the feeling of her inner walls gripping and being drawn out, was vivid.

“Huff, huff, ah…!”

Erin scratched Ash’s back and writhed, not from pain but from excitement.

His heavy body pressed in with nowhere else to go, curling her toes. The assistant she thought she knew left her no room to escape, stoking the fire inside her.

“Haa, Doctor…”

Most of all, Ash’s attitude—

Erin was amazed that he had lost so much control, focusing only on her. His obsessive caresses made her insides tremble.

His rough but careful movements, the way he held back whenever she flinched, the way he gritted his teeth as if wanting to stay inside longer—

It really seemed he’d been holding back for a long time, waiting for this moment…

“Huff, mm!”

Erin finally cried out as she felt the thick, hot liquid spreading between her legs.

* * *

Chirp, chirp.

“Mm…”

As always, Erin woke up to sunlight streaming through the lab window.

But unlike other days—

“…….”

Instead of rising from her usual hunched position at her desk, Erin awoke on the guest sofa in the corner of the lab.

‘Wait.’

A guest sofa?

‘Did our lab ever have one?’

Her shabby lab didn’t even have a spare chair for Ash, let alone a guest sofa.

Surprised, she found herself lying on a truly soft, large sofa.

It looked brand new, but there was none of the unpleasant chemical smell of a new item—just soft, velvety material.

‘When did this get here?’

Raising her upper body in confusion, she felt the thick blanket that had covered her. Even the blanket carried Ash’s refreshing scent.

‘Wait. This blanket is new too.’

Everything, from the feel to the thickness, was different from her usual cheap things. The sofa and blanket didn’t match the run-down lab at all.

“Why is this here…?”

Erin muttered in bewilderment.

Click.

The lab door opened, and a familiar figure appeared.

“You’re awake.”

Ash, with the first button of his shirt undone, looked more relaxed than usual.

His thick glasses were nowhere to be seen. His hair, usually slicked back with oil, now had a few strands falling forward, making him look softer.

‘That’s new too.’

He wasn’t as perfectly groomed as usual, more like he’d just woken up and washed quickly…

‘Ah.’

Erin realized why Ash looked so different and blushed.

‘…He slept here.’

Instead of going home as usual, he’d slept in the lab. Just like she had.

Because…

‘We did… that…’

Together.

Remembering last night made her fingertips tingle.

‘A-Ash… so it’s over…’

‘Yes. We finished once, Doctor.’

‘F-Finished once…?’

Their “experiment” hadn’t ended with just one time.

Right after Ash released inside her, Erin thought it was over and tried to pull away.

She thought the goal was achieved—just feeling the thick liquid between her legs was overwhelming.

‘Haa, Doctor.’

‘Mm, ah?!’

But Ash held her by the waist and pulled her back. Then, holding her surprised body close, he gently continued moving his hips.

‘Ah, mm, Ash! Ah!’

Her already sensitive body was stirred again by his aroused member, heating her up faster than before. Climax came quickly.