Ham Yubin and the Full-Tuning Fusion Genital Customized DX
“Yeah, that’s right… Wait, so you’re not wearing one right now?”
Ham Yubin’s earlier tender expression had vanished completely. Her voice sharpened with pure anger as she pressed me.
Ah, if only I’d held out a little longer. I shouldn’t have said anything.
In that brief moment, I thought it over.
What excuse should I give?
No. Excuses were the worst move.
She’d clearly caught me. Making up a story now would only make her angrier.
Should I apologize, then?
Maybe I should just say sorry and give up on having sex tonight.
Not a bad option. Definitely better than lying.
But if I did that, Ham Yubin would immediately downgrade me in her mind from “the guy from her memories” to “that trash bastard.”
Excuses were the worst choice. Apologizing was only slightly better.
That left only one option.
“That’s right.”
I admitted I had deceived her, then continued before she could explode.
“You were going to—!”
“You’re just so beautiful, I couldn’t help myself.”
I pushed forward aggressively.
“You lied… Wait, what?”
Of course it was a ridiculous excuse.
But she’s pretty innocent.
Even though she rides a motorcycle, the girl herself is pure-hearted. That’s why she still remembered her childhood desk mate after all these years and ended up in this situation with me.
And being pure means she’s weak to momentum. If I could just set the right mood, I might be able to gloss over it.
…If it didn’t work, then too bad.
I’d already finished my military service. Worst case, I’d just have to take the hit.
“I wanted you so badly I even lied to make it happen.”
“…Either way, you still tricked me.”
“I really am sorry about that.”
Sorry was sorry.
But wanting to sleep with her was the honest truth.
I poured that genuine intent into my words, and the sharp glare in her eyes softened just a little.
Got her…!
But jumping straight to penetration now would be a mistake.
“You’ve changed a lot. Must’ve been tough.”
“Yeah…”
I gently lowered my hand and wrapped my arm around her just below the chest, pulling her into a hug. The kind with no sexual intent.
“……”
“……”
We stayed like that for a while. Eventually, Ham Yubin lifted her head, her eyes now sweet and melting.
Then she closed both eyes and sent me a silent signal.
I responded with a deep, sticky kiss.
The moment my tongue slipped inside, I felt her body tense up sharply.
“Mmm…♥”
At the same time, I could tell she was far more aroused than before.
I released the arm that had been holding her and pushed her shirt and bra up together.
Her breasts, too heavy to stay still, bounced free. I grabbed them firmly.
“Ah…!”
Soft. Squishy.
Nothing compared to touching them over her clothes.
It didn’t feel like my hand was grabbing her breast—it felt like her breast was swallowing my hand.
That intoxicating sensation brought my softening cock back to full strength.
“…!”
The head brushed against her thigh. Her skin was quite cool.
The moment my burning hot shaft touched her, she flinched and tried to pull away.
It wasn’t exactly rejection… more like a reflexive movement.
But she couldn’t escape.
Her jeans were still tangled around her knees, binding her legs together.
“Want me to stop?”
I deliberately asked for her consent.
Of course, there was no way I was stopping after coming this far.
This was purely to make her aware that she was agreeing to what we were doing.
She stayed silent for a moment, then answered quietly.
“…Keep going. I want to.”
I slid my cock between her thighs.
Unlike the pleasantly cool air outside, the space between her thighs was warm.
“Ah…!”
At the same time, her sticky arousal flowed down my shaft and dripped onto the ground.
It wasn’t just wet—it was practically pouring.
I could tell she was far more excited than earlier.
“J-just so you know one thing…”
“What?”
“I’m… a virgin.”
Did she realize it herself?
Ham Yubin’s ears turned bright red as she declared her purity.
But it was hard to believe right away.
She had asked to see my cock first and even sucked it. And now she was dripping so much before I even put it in. A virgin?
If that’s true, isn’t this a talent wasted on the wrong era?
…No, probably the same in any era.
Well, I’ll know once I’m inside.
If she really was a virgin, the feeling would be completely different.
“It’s true…!”
“I believe you.”
On the surface, I made it very clear that I trusted her words completely.
At the same time, I began slowly moving my hips back and forth.
Her flowing juices gradually coated my entire length.
“Mmm…♥”
The more my cock was coated in her slick arousal, the sweeter the moans leaking from her lips became.
“I’m putting it in.”
“……”
The moment I announced the penetration, her body stiffened.
Her answer was calm, but I could clearly feel her tension.
“Mm.”
If I thrust in like this, it would hurt quite a bit even if she weren’t a virgin.
To help Ham Yubin relax, I turned her body around.
“W-wait, huh?”
“It’s your first time. I should look at your face while we do it.”
“Haa…♥”
Ham Yubin’s face, now facing me directly, was flushed crimson.
Where had that confident girl from this morning gone?
She avoided my eyes, and the hand gripping my forearm trembled faintly.
“It’s okay.”
I waited a moment for her to calm down.
“It’s going to hurt… right?”
Before long, she spoke again, her voice a little steadier.
I was nervous too.
The wetness I felt was more than enough, but because of my new size, I couldn’t be completely sure.
It was already swollen to a monstrous degree. I honestly wondered if it would even fit all the way in.
“It’s okay.”
Still, I acted calm and experienced to reassure her.
“…Yeah.”
I pulled my pants all the way down and spread her thighs apart.
I felt Ham Yubin’s grip on my forearm tighten.
Without showing any reaction, I slowly positioned myself.
I aligned the head with her entrance and gently applied pressure with my hips.
“Ugh… ngh…!”
Ham Yubin squeezed her eyes shut and gripped my forearm with surprising strength.
“Kgh!”
The sensation was on a completely different level from anything I’d felt with an experienced woman.
It was like carving a brand-new hole into wet clay.
Her narrow, scorching hot flesh clamped down on my cock like it was trying to crush it.
That density. That pressure.
No acting could ever fake this.
She really is a virgin?
With a face and body like that? Why?
I couldn’t understand it, but at the same time, a powerful sense of conquest surged through me.
Yet right after, a small worry crept in.
Will it even fit all the way…?
If she’d been used regularly, maybe. But I was worried whether virgin Ham Yubin could handle my transformed cock.
But that worry turned out to be unnecessary.
“Mmm…?”
Ham Yubin’s tightly shut eyes slowly opened.
She tilted her head down slightly to check where we were connected, then made a puzzled face.
I asked her how she felt.
“You okay?”
“Uh, yeah… It’s different from what I heard?”
Even though this was her first time—or even if she had some experience—this was the kind of cock that should have hurt. Yet Ham Yubin showed no sign of pain at all.
So it really was true.
First Experience Compatible! Contains pain-relief agent!
I’d laughed when I first read it, but it was actually real.
Well, if they could fuse a dildo with a human body, removing pain was probably easy.
And this also proved the other line was real too.
Pregnancy Control OK! User’s will determines definite pregnancy or sterility!
So… I can just fuck her however I want and cum inside?
I didn’t have to hold back or worry about my partner at all?
The item I already liked became even more perfect.
“I’m going to move now. Is that okay?”
“Yeah… It doesn’t hurt at all…”
She nodded carefully, then continued with a slightly wronged tone.
“I really am a virgin…!”
“I know.”
Schlick…!
When I slowly pulled my cock out, she narrowed her eyes and let out a moan.
“Ngh♥”
It was an expression you rarely saw during someone’s first time.
She bit her lower lip, her face struggling to endure the pleasure rising from her lower belly. There was a distinctly lewd glint in her eyes.
But I could believe her words now.
“You’re squeezing me so tightly.”
“Hngh…! Don’t say that…♥”
When I whispered my impressions of her pussy into her ear, she lowered her head and tried to push me away.
Of course, there wasn’t much strength behind it.
Schlick…!
Instead, I lightly rocked my hips.
“Ahng…♥”
An immediately lewd moan burst out.
“Why…?”
She looked at me with wide eyes, as if she couldn’t believe the sound had come from her own mouth.
“Guess we’re really compatible.”
“Compatible?”
I threw her a convenient excuse.
Did it work?
Pleasure began to creep across her previously confused face.
Her reaction gave me confidence.
I spread her legs wider with my hands and thrust up harder.
Schlick—!
“Ahhngk♥”
Unable to hold it back, she let out a fairly loud moan and said,
“It’s weird… ngh… it feels so strange…♥”
“It’s fine. That’s how it’s supposed to feel.”
“R-really…?”
Along with the wet, obscene friction, my cock drove all the way into her deepest part.
“Haung…♥”
Her insides clamped down on me perfectly.
It felt like she had been made solely to take my cock. The seamless, airtight fit sent chills down my spine.
I had to focus hard so my legs wouldn’t give out.
“It’s too… too deep…!”
It seemed the same for Ham Yubin. She kept trying to collapse weakly.
“Careful.”
“Ugh…!”
I supported her ass and pushed her against the wall.
Naturally, Ham Yubin leaned her back against the wall, her lower body thrust forward.
My hands supporting her weight sank deep into the soft flesh of her ass.
Schlick—schlick—!
The dark alley behind the auditorium.
The cold night air.
In the darkness, my hips moved roughly back and forth.
“Ngh♥ Hng… Hic, haaang!”
Ham Yubin’s breasts shook violently.
At the same time, moans poured from her mouth nonstop, enough to make her drool.
“Huuung! Ah, aah…!”
“Here?”
“Yes! Ngh, ahng…♥”
Her claim of being a virgin was starting to sound unbelievable.
She was falling into pleasure at an alarming speed.
“Ahhnghk…♥”
The curved shaft and bulging veins scraped against her inner walls.
Ham Yubin’s vaginal walls writhed and squeezed me greedily.
“Kugh…!”
The overwhelming pleasure we gave each other stole our words. We moved purely on primitive instinct.
It’s coming!
Finally, I reached my limit.
“Aahng♥”
Spurt—spurt—!
“……!”
My cock pulsed as it pumped thick semen directly into her womb.
It was an intensely powerful ejaculation unlike anything I’d experienced before.
Spurt…!
“Ah♥”
“Haa…”
With a sigh, I emptied the last drops. A languid breath escaped me naturally.
When was the last time I’d cum this hard?
“Huaa…♥”
One thing was certain—neither my first masturbation nor my first time had ever felt like this.
It seemed the same for Ham Yubin. Her whole body trembled as she basked in the afterglow of her climax.
.
.
.
We straightened our clothes.
“This is seriously… unbelievable…”
Ham Yubin muttered, still red-faced, glancing at me sideways.
“What is?”
“Going all the way on the very first day…”
Her eyes were full of complaint, but beneath them, deep satisfaction and affection were crystal clear.
“Did you hate it?”
“…No.”
Then why the complaints?
She was the one who seduced me first.
I laughed it off casually and reached out to fix her messy hair.
Ham Yubin looked at me with a slightly anxious expression and opened her mouth.
“Han-gyul.”
“Yeah?”
“Um, about us…”
The moment she tried to say something—
“I can’t hear anything?”
“I swear I heard something!”
“Still, who the hell would be fucking outside on the first day of orientation…”
Oh shit.
“Run.”
“H-huh?”
“If you don’t want to drop out, hurry…!”
“Ah, okay!”
Ham Yubin and I quickly fled the scene. Fortunately, we managed to return to the auditorium without being caught by anyone.
“What were you trying to say earlier?”
“…Never mind. Just drink in moderation.”
“I was joking.”
“…Huh?”
As soon as I gained an incredible cock, I became tied to one woman.
It was a little disappointing, but I wasn’t trash enough to just use her and ghost her.
I’ll just have a little fun on the side.
With that resolution, I asked her.
“What should we use for pet names?”