Custom-Fit
Swish.
Before I could get a single word out, Seongha, who had naturally climbed on top of me, pulled my pants down along with my underwear.
My cock, which had grown stiff under all that teasing-not-teasing, sprang up like a spring the moment it was freed from my clothes.
Unlike yesterday, actually exposing myself fully to a member of the opposite sex brought a faint flush of embarrassment — but when I caught the unsettling look in Seongha's eyes as she stared at my cock, I asked cautiously.
"Seong...ha...?"
Her eyes began flooding red just like yesterday, thick drool trailing from the corner of her mouth. The trauma from yesterday resurfaced, and fear washed over me.
"...Ah, yeah. Oppa... sorry. I just... got a little excited."
The monster — no, Seongha — snapped back to her senses at my call, drilled her gaze into my cock, and then suddenly brought her nose right up to it.
Sniff, sniff...
"What are you doing?"
Flustered that she was suddenly sniffing my genitals, I propped myself up on my elbows and put distance between us.
"The smell coming from down there, Oppa... it's so good. Can't I just smell it a little longer?"
She was asking politely, smiling, but I couldn't shake the feeling that she was desperately holding something back.
It was my first time having sex, but I knew enough to understand that sniffing around down there wasn't part of any standard procedure before the main event.
Still, I also knew — at least in theory — that sex required a certain amount of accommodation, meeting each other's needs even when things felt a little awkward. So despite my misgivings, I had no choice but to accept.
"I just washed a little while ago, but it might still have a bit of a smell..."
"It doesn't matter, Oppa. I love everything about your body's scent. Even if it were the grime under your toenails."
No matter how thoroughly you wash, genitals generally give off that sharp, unpleasant odor, so I couldn't help but feel resistant to letting her smell me.
But when the person herself said she liked it, I had nothing left to say. I shut my mouth and simply watched her sniffing away, propped up on my elbows.
Perhaps self-conscious under my gaze, she made no sound this time, moving her nose across every inch of my cock as she inhaled.
Watching in real time as a member of the opposite sex sniffed my genitals was such a bizarre scene that I had no idea how I was supposed to react.
Every now and then her eyes would roll back like she'd taken a drug, and that startled me a little, but I did my best not to let it show.
Even through all this, the breeze of Seongha's nose and lips against my cock kept it stimulated, and thanks to that, my erection held steady.
"Not bad. Savoring it slowly like this."
After sniffing for a good while, Seongha murmured quietly in the monster's usual tone.
Slurp!
At some point, unable to contain her excitement any longer, precum began trickling from the tip of my glans — and Seongha hurriedly buried her face into my cock.
"Ngh!"
The moment she suddenly swallowed me whole, that same hot, stimulating pressure from yesterday's bath flooded over my entire length, like sinking into a hot spring.
"Ah! — ugh! Ngh!?"
Slurp, slurp...
Seongha took my cock into her mouth and began fellating me.
Unlike yesterday's merciless assault, this time she kept her eyes on me properly, gauging my reactions to each stimulus, and once she judged she'd done enough, she pulled her mouth away.
"Oppa... your precum is so delicious... it's the best..."
Seongha licked the long, glistening strand — a mix of the fluids that had leaked from my urethra and her own saliva — with her tongue, her eyes narrowing along with the corners of her mouth.
For a while she savored the thick liquid lingering in her mouth and on her lips, then smiled with evident satisfaction.
"I- I'm really about to come..."
Having been held at the very edge of release this whole time, I was truly reaching my limit.
"Come for me, Oppa."
Seongha, who noticed my limit faster than anyone, quickly lay down on the floor, spread her legs, stretched both arms out toward me, and whispered.
As I moved toward the space between her legs where a woman's most secret parts waited, something suddenly occurred to me, and I tried to bring my mouth there instead of my cock.
Seongha didn't understand, questioning me with her eyes, and worried I'd done something wrong, I asked.
"I was going to... return the favor. Did I... do something wrong?"
"Do you like watching me get excited, Oppa?"
"I do, but you did it for me too, didn't you?"
At my answer, Seongha was silent for a moment, then broke into a small smile.
"You really are so sweet, Oppa. But you don't have to."
"Huh?"
When I tore my eyes away from her sex and gave her a puzzled look, the monster's deadpan tone returned.
"It doesn't matter. I have no sexual pleasure, so the act is meaningless."
"What? Then those moans from earlier were..."
"Acting."
"R-really?"
Learning that her enthusiastic performance had all been an act dealt a small blow to my confidence.
"Did that disappoint you?"
"A little?"
"I'm sorry. I could have kept up the act and deceived you, but I told you first because I thought it would hurt you more if you found out someday."
"Ah..."
As her expressionless face lost a little of its force and she searched my eyes, I instead felt the sincerity behind it — she'd been thinking of me.
"It's not that you can't do it — it's that I can't feel it. So there's no need to be disappointed or lose your confidence."
The way the monster reassured me had something in it more human than a human.
"And, well — isn't this better for you?"
"What do you mean?"
"You're spared the tedious process of getting me worked up. All you have to do is focus on your own pleasure. ...I'm not sure this is the right way to put it, but from what I understand, prostitutes who sell their bodies for money provide sexual service to men in return. And most men simply accept that service from prostitutes and prioritize their own pleasure. You're welcome to treat me that way."
"Still, that's a bit..."
"You're already paying me. In exchange, you may use this body however you like, whenever you like, as much as you like. If anything, I'm the one who's sorry — what I've received from you is far greater. I received survival, while you only received a moment's pleasure. And I'm happy just watching your face melt with pleasure as you use my body."
The monster reached out, took my cheeks in both hands, and smiled softly.
Set against that beautiful face, the selfless expression showed not the slightest trace of falsehood.
But no matter how indifferent she claimed to be, treating Seongha's body that way felt wrong to me.
Yet if I went back now and tried to pleasure her anyway, my motivation would die for any number of reasons, and quite naturally my options narrowed down to a single thing to do.
"Okay. Th-then, I'm putting it in...?"
"Yes, Oppa, put it in fast. I want to be impaled on your cock, hurry."
Seongha's tone had flipped back again. I hadn't gotten used to it, but honestly it turned me on, so I didn't call it out.
This was my first time having sex.
Putting my thing inside a woman's most private place.
Heart pounding, I pushed my erect cock in deep — and bumped against something.
Is this it...? Ah, I slipped.
Pathetic even to myself, my cock wandered blindly through empty air, unable to find the hole.
If I'd fumbled like this with the Seongha of old, she would surely have looked at me with contempt. But the Seongha of now showed no such thing — she simply reached out, kindly took hold of my cock, and pressed it up against her entrance.
"Ah... nngh!"
The moment my cock slid inside, she clamped down, and I was sucked deeper in.
The folds inside her gripped my cock so tightly and so intricately that I could feel every fine ridge, and though I hadn't even come, my body trembled involuntarily with pleasure.
"Oppa, how is it? Is the inside okay?"
"Ah, — nn, yeah, it's, it hurts a little?"
"Sorry. I'll loosen up little by little. Tell me when it feels right."
Is sex normally done like this...?
No — even a master of Kegel exercises couldn't possibly control the tightness of their own sex like this, at will.
Something like this was only possible because the being in front of me wasn't human.
Just as Seongha had said, the folds wrapped around my cock began relaxing, very, very slowly, and once it reached a pressure that felt fine, I told her.
"Yeah, this is about right."
"The temperature?"
"A little... hot, I guess? Ah, no, it's good. This is perfect."
Having a woman's insides custom-tailored to fit my body like some product calibration wasn't exactly the process of sex I'd imagined — but from the standpoint of pleasure, nothing could have been better.
"Ah, this is bad... I'm going to come straight away, any second now."
Ironically, a woman's insides fitted perfectly to me felt so good that the urge to come surged up before I'd even started moving.
"That's fine. Come, then come again. I like that better. There's no pregnancy to worry about, so no need to feel responsible — you can come inside."
Seongha wiped away the worry festering in a corner of my mind, then wrapped her arms and legs around me, binding me the way a spider coils around prey caught in its web.
"Come, Oppa."
Even as her whisper against my ear made my head spin, it still bothered me that I alone would selfishly climax.
"I told you already, don't worry about that. But if it still makes you feel guilty, then show me your face when you come. Watching that is my climax."
Squeeze.
The pressure inside her increased, urgent, as if hurrying me along — and with no room left for rational thought, I began thrusting my hips.
Squelch...
"Ah, — haah, nnh! I'm, I'm coming!"
Barely a few strokes in and the sensation of climax crashed over me, and to release whatever was surging up from somewhere deep inside me, I drove myself in to the very depths of her.
"Nngh, ah...!"
The inner walls clamped down hard in time with me, and my mind went white.
Seongha simply watched my face — slack and stupid, drowned in pleasure — with a faint, satisfied smile, saying nothing at all.