Custom Giant Penis
Bwurk! Ulgh—aaah!
"Ahh, ahhnnn…!"
It was right after I'd finished another filthy, all-out round of sex with Eun Chaeyeon at the Pet-Friendly Hotel, same as always.
Mochi! Breaking news!
What is it?
Miss Yeseo finally masturbated!
Oh.
The news I'd been waiting and waiting for had finally arrived.
Smack!
"Kyaaah…!"
I gave Eun Chaeyeon's plump, freshly climaxed ass a sharp slap and grinned. Then I asked Roselina,
Did she do it while clutching my clothes and sniffing them?
Yes! Leaving them there was an excellent call! The moment Miss Yeseo caught your scent, her arousal shot straight up to seventy-five percent!
So it really was a good move, huh?
Of course! It was absolutely perfect!
Heh. I am pretty sharp, aren't I.
The fact that I'd spent my school years sleeping through class instead of studying would remain a secret.
Anyway, seventy-five percent arousal wasn't bad. That was about the usual range after masturbation, and considering Baek Yeseo's sex drive was on the distinctly low side, she'd put up a solid showing.
Of course—
"Heeuh… Mochi's cock… it felt so goood…."
—Eun Chaeyeon, currently dribbling cum from her pussy, had blown past a new record of one hundred thirty percent. But that was only because she'd been mating with me, and my technique had leveled up.
Either way, the operation was a success.
I had perfectly engineered a situation where Baek Yeseo masturbated while thinking of me.
I'd put in a serious amount of work for that plan. Deliberately flashing her my erect cock in the middle of the night. Using Pheromone Temptation every morning to make her feel desire for me. Secretly leaving clothes saturated with my scent in her room…
Four days had passed like that.
And at last, it had borne fruit.
Maybe it's because I hit level three yesterday.
Pheromone Temptation had gotten stronger, which was probably why results had come faster than expected.
For the record, all my other skills had climbed to level five. I'd been fucking Eun Chaeyeon hard for those four days, after all.
And I'd picked up a new skill, too.
That was how Roselina had been able to detect Baek Yeseo's arousal level and the fact that she'd masturbated, even from a distance.
Heroine Registration Chart
That was the name of it.
It let me check a registered beauty's virginity status, sexual preferences, and arousal level. It even kept a log of when she'd last masturbated.
Not exactly a god-tier skill.
Honestly, it was more Roselina's skill than mine. I found reading all that text annoying, so I'd just told her to feed me the relevant info at the right moments.
Still, thanks to it I'd learned that Baek Yeseo had gotten herself off, so it was pretty useful.
I'll be able to fuck her soon enough.
What would a popular blonde idol's pussy taste like?
I was so excited I could barely stand it.
Of course, she'd already masturbated thinking about me. If I just raped her right now, she might even forgive me—but my goal wasn't simply to have sex with Baek Yeseo.
I'd already done that once with Eun Chaeyeon. This time, I was going to take her a different way.
More precisely, I wasn't going to take her. I was going to get taken.
I wanted Baek Yeseo to fuck me.
I wanted to watch the maknae of a girl group, unable to resist her own lust, rape her best friend's pet dog.
What a total pervert I'd become.
Reverse rape had never really been my thing, but in this case I was the one engineering my own assault, and somehow that made it incredibly hot.
And for all the "reverse rape" talk, it would probably feel pretty pure and tender.
Because Baek Yeseo was a virgin.
I'd confirmed it yesterday with Heroine Registration Chart.
I still can't believe she was a virgin too.
It surprised me even now. Sure, her sex drive was low, but she was drop-dead gorgeous and tossed out dirty jokes without blinking. I'd figured she was a total slut.
Who knew she'd been a demure little virgin, saving herself just to offer it up to me.
Anyway, enough about Baek Yeseo.
My session with Eun Chaeyeon wasn't over yet.
Slap! Slap! Slap!
"…Aang!"
I patted the left cheek of Eun Chaeyeon's still-twitching ass three times. Her massive rear jiggled and bounced under my paw.
That was the signal to switch from doggy style to reverse full nelson. After sending telepathic messages back and forth during sex so many times, these little code signals had developed naturally.
Eun Chaeyeon slid off the bed without needing to be told. Then she scooped me right up, holding me steady so I wouldn't fall, and pressed her furry pussy against my fully erect, massive cock.
Schlick!
Schluuurp!
"Hnnngh…!"
My dick slid smoothly into her cunt.
"Hehehe… Mochi's cock… it's inside againnn…."
She gazed at me with lewd eyes that looked ready to sprout heart pupils, then started rolling her hips, launching into a piston rhythm.
Schlick! Squish! Schlick! Squish!
"Kyaahn…! Ahhk, hnh, haaang…!"
Her sweet moans tickled my ears.
The pleasure from Eun Chaeyeon's soaked pussy was unreal, too.
Reverse full nelson always felt amazing no matter when we did it. I only asked for it occasionally since doing it too often seemed like it'd wear her out, but every time it happened I got this deeply satisfied feeling of being waited on hand and foot.
Slap! Slap! Slap! Slap! Slap!
"Ah, haahk! Aang, hnh! Hngk! Heeuhn…!"
And so, while Eun Chaeyeon was busy slamming her pussy down on my cock—
This is getting a little boring.
—that thought suddenly crossed my mind.
Don't get me wrong, it still felt good. Sex with a gorgeous woman was incredibly happy and fun. Sometimes it felt like I owned the whole world.
But eventually, you get tired of anything, right?
Even the most entertaining game gets stale if you play it every single day.
Sex was no different.
I'd gotten way too used to mating with Eun Chaeyeon.
That was part of why I wanted to fuck Baek Yeseo—for a new experience. Eating the same woman over and over was starting to feel a little dull.
Slap! Slap! Slap!
"Hat! Hnngh, kuh, haang…!"
Not that Eun Chaeyeon's pussy grip was bad. Even now she was clenching hard, drooling love juices, thrashing her hips like a woman possessed.
Her vaginal pressure was rich, and the texture of her inner walls felt incredible.
Eun Chaeyeon was definitely a legendary piece of ass.
I was just getting bored.
They say human greed knows no bounds…
Hard to believe a guy who'd been a lifelong virgin until recently was having this kind of problem.
Anyway, even the sensation of climax had been electric at first, but now it felt familiar.
Hm? The sensation of climax?
Come to think of it.
I was a dog.
I urgently called for Roselina.
What is it, Mochi?
Hey, can I seriously not use an actual dog dick?
Strictly speaking, of course I had a dog's genitals. I was a dog.
It was just that when I used Going to be Big, my fully erect massive cock transformed into a human penis.
I'd been human originally, so naturally I was more comfortable fucking with a human man's cock.
But I couldn't help wondering—if I used a completely different kind of genitalia, would I feel a whole new kind of pleasure?
One moment. I'll look into it right away.
Good. Finish before I cum.
Roselina was just the AI installed in the Sex System, not the system itself, so moments like this came up from time to time.
Less than a minute later, she spoke up in a bright voice.
I found a way! If you fuse two skills together, you can obtain a new one!
Skill fusion? That's a thing?
Yes! The level required for fusion varies by skill… but as it happens, you have two skills that can be fused right now!
Roselina sounded genuinely excited as she said it.
When I'd first met her she'd seemed a bit stiff, but she'd started talking a lot more like a real person.
I found myself smiling.
Then hurry up and fuse those skills for me.
Yes! Right away!
The fusion happened in an instant.
The skills used were Going to be Big and Custom Studded Penis.
And the skill born from them was called Custom Giant Penis.
◈ Retains all functions of Going to be Big and Custom Studded Penis
◈ Freely reshape penis at will
◈ Currently limited to canine form; higher levels unlock other animal genitalia
I could still use everything the original two skills had offered, naturally.
On top of that, a new function had been added: the ability to freely reshape my cock however I wanted.
For now I could only switch it to the dog dick attached to my body, but apparently once the level got higher I'd be able to use other animals' genitals too. That part didn't exactly appeal to me—but anyway.
Let's give it a try.
Crrrk-crack!
With a somewhat noisy sound, the human man's cock transformed into a canine penis.
Even like this, it was still just as massive as before.
"Hwaaang…!? W-what is thaaat…?!"
Startled by the sudden change in sensation, she froze mid-thrust.
Looking at her lewd face flushed red with bewilderment, I started moving my hips myself.
Thrust-thrust-thrust-thrust-thrust!
"Haang! Hauh! Hnh! What is thisss… the feeling suddenly got so weeeird…! Ahh! Hnh! Ahaang…!"
Whether the new sensation had excited her even more, she convulsed through what looked like a light orgasm, spraying love juices in little spurts.
It definitely felt different for her.
Male dogs had a baculum, after all, and when they got hard the bulbus glandis swelled up and sealed the vaginal opening shut so they couldn't pull out right after ejaculating.
It was bound to feel nothing like a human man's cock.
The pleasure I felt was different too.
I don't even know how to describe this feeling… but it's fucking amazing.
Honestly, I couldn't say whether it was distinctly better than a human dick, but the novelty of the sensation made it feel great. And the pleasure of climax was going to be next-level, I could already tell.
Slap-slap-slap-slap-slap!
"Hauh! Hng! Mochi's dick… aaang! Something's different… it's different… hnnh! Different feels even betteeer…! Kyaahn…!"
She seemed to cum lightly again, her whole body shuddering.
Out of the corner of my eye I caught her breasts bouncing and swaying.
I brought my mouth to those enormous tits and licked and sucked at her pink areolae and stiff nipples.
Slurp-slurp-slurp-slurp-slurp!
"Hngh?! Hhat?! Hnnhk?!"
Caught off guard by the sudden pleasure in her nipples, she let out flustered moans.
Brrrrrr—
And with that, the first ejaculation hit. Supposedly it was mostly prostatic fluid that neutralized the inside of the pussy—and it felt nothing like cumming with a human cock.
Then, not long after the thrusting resumed, an enormous and entirely new climax sensation came flooding in.
And at last—
"Wawoo! Woo!"
—the real ejaculation began.
Ulgh—aaaaah!
"Auhk, aaaah! Gnhhhnnn……!"
Fwoooosh! Pshuuuuu!
At the same time, Eun Chaeyeon squirted like a fountain.
"Aheuhn…! I keep squirting wateeer… hnh! Haang!"
Yeah, well, that's because you've got a super wet pussy.
Splash! Splaaash!
Her sweet-and-salty cunt water sprayed hard across my body as she twitched and trembled.
I licked the pussy juice off my face and kept on cumming.