Everyone Has a First Time
"Fuck, that fuckin' sucks! How could you say that to me?!"
"No, not you, Mari—it's not that you fuckin' suck…!"
"Kang Seo-yoon, you…!"
Whoosh—
"…?"
I didn't feel the spicy sting of her hand, so I cracked open the eyes I'd squeezed shut, wondering what the hell?
"Mari, you okay?"
Her eyes brimming with tears, Mari raised her hand to smack my back again but froze mid-swing.
"What's wrong? Did it hurt or something…?"
"…!"
She shook her head furiously side to side and hesitantly parted her lips.
"Th-the feeling's weird…"
No way.
I glanced down, and there it was: the front of her pants, soaked darker than before, the wet spot glaringly obvious.
"Did you cum?"
"…!"
"Kyaaang!"
Her hand, hovering in the air, sliced through and slammed into my back. Wait, wasn't it feeling weird? Doesn't that mean you didn't cum?! It's been twenty years since I lost my own dick, so my memory's fuzzy, sure!
"H-heeek…!"
She froze again, eyes rolling tearily to meet mine. Her pants still bulged obscenely, twitching visibly.
"Does it… feel stimulated or something?"
"…!"
She nodded vigorously and slowly lowered her arm.
"Come to think of it, those pajamas—you said they were expensive, right?"
When did we buy them? A few months ago, on her birthday, when we all went shopping together… Yeah, we got matching ones for a grown-up pajama party now that we're all adults. Pricey, high-end stuff. Made of silk, no less.
And what does that mean?
"Are your pants, like, super tight right now?"
"Y-yeah…!"
Her face was ripening tomato-red now, tears dangling from her lashes.
"Okay. Then let's get up—nice and slow, real slow. Got it?"
I slid off the bed first, careful not to jostle the mattress, planting my feet on the floor. Then I reached out to her.
"Here, I'll hold you, so just—"
"Hey!!!"
The second "dick" left my mouth, the bed lurched with a thud!
What the—? She's not some sex-crazed monkey; how does just hearing the word set her off like that?
"…Let's get up without stimulating that thing too much."
No choice but to euphemize. I held out my hand again, and she inched her ass forward.
Her feet hit the floor with a soft thud, and we both sighed in relief. Her grip on my hand was iron-tight, like she'd never let go, trembling all the while. Her palm was slick with nervous sweat.
"Good job. Now stand up. You can do it, right?"
"…Y-yeah!"
She lifted her hips off the bed ever so slightly—and that's when her monster cock, which had quieted a bit, sprang up with a thwack!

"Wha—what?!"
She yelped, dropping my hand and flopping back onto the bed.
"Why…?"
I smacked my forehead, dredging up memories from my past life.
"…Guys' dicks have muscles there, so when you stand, your thigh and ass muscles pull it along."
"Huh?"
"Basically, if you push off hard to stand, it moves with you."
"R-really?"
Mari gulped, staring at her throbbing beast.
"But Seo-yoon."
"Yeah?"
"You were a guy… how do you know all this?"
"Uh…"
'Cause I was one in my past life?' Yeah, can't say that. I just looked away.
"No way—you had a boyfriend?!"
"Hey, fuck—I mean, what boyfriend?!"
"Right? You didn't!"
"We're together all the time, and you're asking now?"
Was that really the priority here? But talking distracted her enough that the bulge deflated a little.
'Gotta keep her mind off it…' Nah, that'd take forever. And with precum leaking past her panties, soaking her pants—if even a tiny stimulation sets her off…
A guy used to it might hold out, but Mari's dick grew overnight. She's hypersensitive.
'Then…'
I strode over, slipped my hands under her armpits, and hoisted her up.
"Huh? Seo-yoon?"
She blinked in confusion as I set her down. She wobbled but steadied herself.
"Y-you…!"
"Figured it'd take too long otherwise."
"Shii…"
Got her up, great… but now what? Morning pee first? But where does a futanari piss from? Pussy? Or the new dick?

"S-Seo-yoon…"
"Huh?"
Mari stood bow-legged like she was desperate to pee, thighs clenched, ass tucked back as she clutched my sleeve.
"C-come to the bathroom with me! Just that far!"
She must've reached the same conclusion, her face set in grim determination. …Though with her blushing cheeks and teary eyes, she just looked adorable begging.
"Hoo, hoo…!"
We inched forward, step by careful step. The living room, a ten-second stroll normally, felt eternal. She breathed raggedly, hyper-focused—probably terrified relaxing would make it explode.
'Is futanari different? Even sensitive guys aren't this bad.'
"G-good… job."
Finally at the bathroom door, she released my hand and gripped the knob gingerly.
"Want me to open it?"
"Y-yeah, please…"
Creeeak—the toilet came into view.
"…You know what to do?"
"Pull down pants, aim, right?"
"For guys' dicks, you gotta hold it steady or it shakes and sprays."
"Huh?"
"Like a fire hose spraying water?"
"Oh, yeah…"
"Same deal—you hold it so it doesn't wiggle."
"…Me?"
She glanced down, then back up.
"Hold this?"
"Want me to?"
"…!"
She jolted, shuffling into the bathroom in her awkward stance.
"N-no, I got it. I-I'll… do it…"
She nudged the door shut with a click.
Yeah, even for fifteen-year besties, asking me to hold your dick while you piss—or cum, whatever—is a bit much. A lot much.
"I'll be right outside—if you need anything, call!"
"O-okay…!"
Her muffled voice faded as I pulled out my phone and opened Jangjak Wiki.
'Futanari are real, huh?'
I needed info. Accurate, detailed info. Lots of it.
* * *
"Hoo, hoo…!"
Standing before the toilet, Mari cautiously gripped her waistband. She tried easing them down without stimulation, but the rigid shaft snagged with a thunk.
"Why… won't it go down…?!"
Her lower half bulged like she'd strapped on a small club. She cursed last night's drinking—but Seo-yoon had matched her shot for shot and was fine. This monstrous thing was hers alone.
"Nngh…"
Tugging at the waistband stretched it out, revealing the base: thick as both her hands clenched. Blood-engorged, heavy as a real club.
'Th-this thick?!'
Mari was a full-grown twenty-year-old. She'd seen dicks online—puberty in the internet age meant endless pics and vids of anonymous cocks and pussies. Small, big, ugly, pretty. She leaned toward bigger ones…
'But never dreamed it'd be on me!'
Her breath grew ragged. Her massive cock emerged inch by inch, veins bulging, flushed red and scorching hot. Hitting the cooler air was stimulation enough.
"Huh? Wha…?"

Pants halfway down, her colossal shaft snagged, bending downward. The pressure built—and her heavy balls tightened, an unbearable urge surging.
"Eh?"
But Mari was a woman. Woke up with a dick today, sure—but until this morning, a proper blonde, blue-eyed big-titted girl. She sensed something coming instinctively, but not that it was an orgasm. Just that she couldn't hold it anymore.
She yanked her pants down the rest of the way—and thwang! Her cock sprang free.
"Ah."
It shook wildly, electric pleasure shooting from her ass crack up her spine, racing to her neck, her brain—exploding into ecstasy.
Her first ejaculation in twenty years of life.

BUUUUURRRRP!!!
"!!!"
A wave of sensation crashed over her brain like it was short-circuiting.