Ham Yu-bin and the Full-Tuning Fusion Genital Customized DX
When I finished fixing my pants and turned around, she was already looking away.
“Sorry.”
The biker girl apologized without meeting my eyes.
“No, it’s fine… Senior, what are you doing here anyway?”
“…Because of this.”
What she pulled out was a cigarette. Not an e-cig—a regular one.
“You don’t smoke?”
“Nah. Tastes like shit if I smoke alone.”
Wait… is she saying what I think she’s saying?
Did she follow me because she thought I was going to light up?
To test my theory, I asked as casually as I could.
“Then… want to smoke together?”
“Pass. My appetite’s already ruined from looking at that eyesore.”
Eyesore, huh.
Yeah, I guess it does look pretty monstrous.
I nodded, convinced by her blunt choice of words.
Maybe my reaction piqued her curiosity, because she lowered her voice and asked,
“…Did you get surgery on that thing?”
“Huh?”
“Or is it natural?”
“What are you even—oh.”
It took me a second because the old version of me had never looked like this.
“Never had surgery, no.”
I’d experienced something closer to magic than surgery, but I’d never gone under a knife or needle, so it wasn’t exactly a lie.
I really hope it doesn’t just disappear one day.
If it did, I might actually cry. I haven’t even gotten to use it yet.
She stayed quiet for a moment after my answer, then spoke again.
“I didn’t get a good look earlier. Can I see it again?”
“You want me to show you again?”
“Yeah.”
How the hell was I supposed to interpret that?
Was she really suggesting what I thought she was?
No, don’t overthink it.
Even I had to admit the size and shape were bizarre. Her request could genuinely be pure curiosity.
“If you don’t want to, that’s fine too.”
“No, it’s okay.”
I answered quickly and dropped my pants right away. No point in stalling and killing the mood.
She crouched down in front of my lower half and immediately said,
“Pervert.”
“Excuse me?”
“Why aren’t you wearing underwear?”
“…They got wet.”
I gave a quick explanation before she could misunderstand. I’d been washing my upper body, gotten soaked, and was trying to dry off.
“I’ll believe you.”
“It’s true.”
“Who said it wasn’t?”
Her tone made it obvious she didn’t believe a word.
“Doesn’t it get uncomfortable, walking around with something like that?”
“Well…”
It had only been like this since today, so I honestly didn’t know. But I couldn’t say that, so I gave a vague answer and moved on.
“Does it get even bigger when you’re turned on?”
“Probably.”
“Wait! Can you even get it up?”
“Of course I can!”
Was she seriously trying to turn me into a eunuch all of a sudden?
“You said ‘probably’ and I got the wrong idea.”
“It changes depending on the situation.”
“Why?”
“A guy’s size changes based on how turned on he is. That’s normal.”
Had she not had much experience with her boyfriend? This was common knowledge if you’d done it even a few times.
“……”
“……”
Silence fell.
Even after I finished talking, she kept staring at my cock without saying a word.
It’s kind of cold, though.
It was still early spring. The chill hadn’t left the air, and the sun had already set, making it even colder. Standing there with my pants down only made it worse.
But my newly upgraded pride clearly didn’t care about the temperature.
The thing that should have been shrinking in the cold was instead slowly swelling, gaining size and presence.
“……!”
There were many reasons for an erection. It could have been the alcohol driving blood flow downward, or the sheer absurdity of the situation. But the biggest factor was obvious.
A woman I’d just met today—whose name I didn’t even know—was crouching right in front of me, staring at my exposed lower half from inches away.
Whatever the cause, my cock, which had already been monstrous even while soft, was gradually returning to its full, intimidating glory.
“……!”
Maybe because it was so big. The tip passed just a few centimeters in front of her face as she observed it from a slight distance.
“Whoa… wow…!”
I watched her eyes widen in amazement. She reached out with a soft gasp of wonder.
“Mmm…!”
“Does it hurt?”
“Your hand’s cold.”
The sensation of her chilled fingers was completely new to me. It wasn’t the rough feel of my own hand during solo sessions—this was a woman’s slender, soft touch.
“It’s getting even bigger…?”
“I told you.”
A man’s size changes depending on how aroused he is.
Honestly, the difference isn’t usually this dramatic.
But the unfamiliar stimulation made my cock swell until it felt like it might burst.
Details that had been hidden while it was smaller now stood out clearly. The shaft rose straight from the base before curving upward midway. Thick, bulging veins and a flared, mushroom-like head completed the picture.
It looked like it had been designed for one purpose only: to deliver overwhelming pleasure to a woman.
And the person touching it directly seemed to understand that even better than I did. I could feel it in every stroke of her fingers.
When her fingertips slid along the shaft and brushed over the head—
“Nngh…”
“……”
A moan slipped out before I could stop it.
She glanced up at my face for a second, then went right back to focusing on my cock. Her entire attention was locked on it, like nothing else in the world mattered.
That attitude was more arousing than I expected. Fresh blood surged downward, making me even harder.
“Ah, seriously…”
“Yes?”
She bit her lower lip while staring, hesitated several times, then finally spoke.
“…If I asked you to do it with me right here, would you think I’m a total slut?”
“No!”
The answer flew out before my brain even had time to process the question.
Come on. What else could that question possibly mean?
Only an absolute idiot would take it literally and say yes. That had nothing to do with reading the room.
“I just think someone as beautiful as you, Senior, has every right to be forward.”
“Still the same smooth talker, I see.”
“Sorry?”
“I must be out of my mind…”
Instead of answering me, she cursed at herself and leaned her face closer to my cock.
“Mmm… chu!”
“Ugh…!”
A faint lipstick mark was left on the head. It wasn’t sharp—more like it had blurred and spread a little.
“It’s seriously too big…”
“Sorry.”
I apologized after she gave up trying to fit it in her mouth and grumbled.
It’s not actually too big for your mouth, though.
The transformed cock was huge, but not so huge that it couldn’t fit between her lips.
She shot me a quick glare, then stuck out her tongue and started licking along the shaft.
“What are you—mmh!”
“It’s too big, so I’m… mmm… getting it wet with spit… haa…”
She didn’t have to do that.
It was customized, after all.
“Huh?”
“Slurp. What?”
“Nothing. Never mind.”
A piece of information suddenly floated up in my mind, like I had always known it.
Now that I think about it, I’m pretty sure the name had something like “customized” in it.
I’d been drunk when I first saw it, so the memory was hazy. But I clearly remembered wondering if the “customized” part meant it was made-to-order.
The fact that it had been absorbed into my body was already weird enough. Was the instruction manual injected directly into my brain too?
“Doesn’t matter.”
“Chu… You keep muttering stuff—”
“I said it doesn’t hurt, so don’t worry about it.”
“What? Eep!”
I grabbed her arm, pulled her up, and pushed her against the wall.
Must have been the alcohol. I couldn’t quite control my strength.
She snapped at me with fiery eyes.
“You’re way too impatient… hey!”
But there was no real rejection in her voice.
I caught her hips as they naturally tilted backward and undid the button on her pants. Then I yanked both her jeans and panties down to her thighs, pulling the fabric aside.
Nice.
The panties were damp where my fingers brushed them. Not completely soaked, but more than wet enough for what we were about to do.
“Now that I think about it.”
“What.”
Maybe because I’d been a little rough, her reply came out slightly sulky.
I ignored it and asked what I was curious about.
“I still haven’t heard your name, Senior.”
“…Ham Yu-bin.”
“Ham Yu-bin?”
The name sounded familiar.
She looked at me with eyes that seemed to hold some kind of expectation after telling me her name.
Had there been a beauty like her among the people I knew?
No matter how hard I searched my memories, nothing came up. But one thing was certain.
Shit. This is bad.
I was about to have sex with someone from my past, but the other person didn’t seem to realize I had no idea who she was. No matter what I said, the mood would be ruined.
“Do you… remember me?”
…No.
There was a way out.
“Of course I do.”
“Really?”
It was a complete lie.
I just had to get through the next few minutes. I could always dig through old photo albums later to figure out who she was. As long as I didn’t get caught right now, I’d be fine.
“You’ve gotten incredibly beautiful.”
“Ugh…!”
Luckily, Ham Yu-bin didn’t seem to notice my lie. She only showed a shy, embarrassed reaction to the compliment.
Okay. We’re good.
Hiding my trash-like inner thoughts, I continued.
I pulled down Ham Yu-bin’s zipper and slipped my hand inside her shirt.
“Oh!”
“Eep…!”
Even through her bra, the heavy weight was unmistakable. I couldn’t even fit one of her breasts in a single hand. A sigh of pure admiration escaped me.
So that’s why she dresses like that.
The baggy jumper and department jacket. Both were loose, oversized clothes perfect for hiding her figure.
To think she was covering up breasts this amazing. On behalf of all men, I was genuinely disappointed.
Her boyfriend must be living the dream.
He could grope these incredible tits whenever he wanted.
…The moment that thought crossed my mind, I remembered her saying she had a boyfriend.
Not that I’m going to stop now.
She was the one who suggested this first. Still, as a man, I should at least confirm.
“Didn’t you say you had a boyfriend?”
“…That was a lie.”
“Why?”
“I recognized you right away, but it looked like you didn’t remember me, so…”
Her voice trailed off. She averted her eyes and added in a small, defensive tone,
“…I was just messing with you a little.”
After a brief pause, she suddenly asked with a suspicious look,
“But why are you still speaking so politely?”
“Huh? I guess it just became a habit.”
Maybe because I was in a crisis, my brain was working at lightning speed. Even though it was a sharp question that would normally have left me stuttering, I managed to dodge it smoothly.
Who the hell is she?
She still looked slightly doubtful about the polite speech. If she found out I really didn’t remember her, the fallout would be huge. I had to figure it out as fast as possible.
From the way she talked, she was definitely an old classmate. It couldn’t be high school since I went to an all-boys school. So elementary or middle school?
Someone my age named Ham Yu-bin… Ham… Yu-bin?
“…Ham Yu-bin?”
“What?”
Ham Yu-bin.
Elementary school classmate. The chubby girl who sat next to me and loved food.
“Garam Elementary’s Ham Yu-bin?”
That chubby girl?