Let's Go! Diaper Expedition Team!
Shaaaah— A warm stream of water poured down.
The narrow shower attached to the back of the lab. I was lathering shampoo into Luna's hair as she squatted there, like I was tending to a little kid. Even capping it with a shower cap.
"Hold still."
"Hehe... Feels so good...."
Luna closed her eyes tight and leaned into my touch. Her dirt-caked naked body was gradually regaining its original color.
"Master's hands make me melt."
"Don't get dramatic."
"It's true. Scrub harder."
She thrust her ass back toward me.
"Here too."
"Do that yourself."
"Can't reach. Spread it and wash me."

Luna spread her ass cheeks with both hands. Between the pale white flesh, her pinkish wrinkles were exposed in stark detail. Still not over her arousal, it twitched faintly, oozing a milky fluid.
"Stick your finger in."
"......"
"Gotta clean inside too. I hate feeling dirty."
Acting all germaphobic after her outdoor piss show just minutes ago. I sighed and aimed the showerhead.
Shaaaah—!
"Kyaaah!♡"
The water pressure slammed into her sensitive membranes. Luna collapsed onto the floor with a shriek.
"Too strong...! Feels like it's hitting my womb...!"
"Clean now? Dry off and come out."
I tossed her a towel and turned away first. Any longer in this cramped space, and we'd be going for round two. Not that I had the stamina left—my battery was dead.
=============================
"This is bad."
Thanks to Luna's outdoor urination spectacle last night, we'd used up the last diaper. The powder had spilled everywhere in the chaos too.
Without those, there was no way to handle tonight's scheduled "great flood."
I checked fast delivery on my smartphone.
> [Temporarily Sold Out]
> [Restock Scheduled: 3 Days Later]
"Haa."
A sigh escaped me. Maybe another brand? But Luna's skin was sensitive. Anything even slightly rough would cause a red rash right away. I couldn't bear to see that.
"What's wrong? Something serious?"
Luna peeked over my shoulder from behind. Bottomless, wearing only my shirt, sipping milk.
"Your usual one's sold out. Delivery will take a few days."
"Then just wait."
"What about tonight?"
"Doesn't matter. It's just a few days—make do."
Luna shrugged it off like it was nothing. But I shook my head. Exhausted to death, I still dragged myself up.
"No way. I'll hit the mart."
"Now? You barely slept last night. Look at those dark circles."
"I'll go buy it myself. Found a place with stock."
I threw on an outer layer. Luna licked the milk mustache off her lip, then blocked my path.
"Si-hun, why bother? I'm really fine."
"You're not."
"Huh?"
I looked straight into Luna's eyes.
"Professor, you hate feeling sticky. You'd toss and turn all night without sleeping a wink."
"......"
"And if you slap on some cheap knockoff and whine about it hurting? I can't deal with the stress."
I added awkwardly, feeling embarrassed. Luna's eyes widened at my words. She stared up at me blankly for a moment, then her lips quivered.
Whoosh!
"Hwaaaang! Master!"
Luna threw her arms around my neck and clung.
"W-what are you doing!"
"I'm touched! Worried my butt might hurt? Is that it?"
"You're heavy—get off."
"No way! Master is the best! My hubby is the best!"
Mwah! Mwah! Mwah!
She peppered my face with sloppy kisses. Baby scent and milk wafted over me.
"Master's such a... total idiot. Worrying about a slut like me's ass."
"It's my job."
Luna nuzzled into my chest. After a while, she looked up. The playfulness was gone, leaving only moist eyes.
"Thanks...."
"......"
"For real. In 500 years, you're the first guy to worry about my diapers."
That's 'cause you're the only 500-year-old elf wearing them. I swallowed the retort—her expression was too serious.
"If you're going, I'm coming too."
"Rest—you're tired."
"No. It's a date. And...."
Luna pulled a card from her wallet. It gleamed. Black metal with a shimmering gold emblem in the center.
[Adelheit - Black Grade]
"You're buying my stuff. Use this."
"What's this?"
"Family card. Limit? Probably enough to buy the whole mart."
Luna slipped it into my pocket with a grin.
"Don't skimp—buy it all. The best ones. Get yourself something tasty too."
Her wine-red eyes sparkled.
"But if people recognize you...."
Professor shopping for diapers with me? Scandal city.
"Disguise."
"Last time we almost got caught."
"This time for real. Magic."
Poof!
Smoke billowed. What emerged was an ordinary, cute short-haired college girl with faint freckles.
"Let's go! Diaper Expedition Team!"
Luna bounced excitedly. I took her hand with a helpless sigh and headed out.
=============
The big city mart. We grabbed a cart and went inside. Luna clung to my shirt hem, trailing behind.
I aimed straight for the diaper aisle as fast as possible. But suddenly, Luna plopped onto the floor.
"What now."
"Legs hurt. Carry me."
"We're in a mart—walk."
"Carry me! Or put me in the cart!"
Luna rolled on the floor, throwing a tantrum. A grown woman whining on the mart floor. Stares burned into us.
What's with that couple?
Should I film it?
Does she have some disability?
Poor guy.
Whispers reached me. My face burned—I couldn't take it.
"Fine! I'll carry you—just get up, please!"
I awkwardly hoisted Luna into the cart's bottom basket and crammed her in. Squatting there, she looked blissfully content, like she owned the world.

"Vroom! Go go go!"
"Don't make engine noises."
I pushed the cart like I was fleeing. At the diaper aisle, Luna turned meek as a lamb, like the tantrum never happened. Perched on her ass in the cart, legs dangling out, sucking a pacifier.
"How 'bout these? They have characters on 'em."
"Kids' size—won't fit. And Professor, your butt's bigger than you think."
"What?! My ass is small! Perky and pretty!"
Luna yelled. Moms nearby glanced over. I clamped her mouth shut.
"Lower your voice."
"Mmph mmph...!"
"Oh my, newlyweds?"
The employee's voice halted the cart. A promo lady for diapers. She beamed at me and cart-Luna alternately.
"Aigoo, wife's not well? But hubby's sweet."
Misinterpreting Luna's antics as a disability. Better than the truth.
"Y-yeah. Her legs are... "
"Oh dear. Tsk tsk. Here for diapers?"
"Uh? Y-yeah...."
"Adult ones are over there—this is baby stuff. Looking for kid's?"
Her gaze dropped to Luna's belly. Luna grinned. Bad omen.
Luna shot up in the cart.
"Yes! I got a baby!"
"Oh! Congrats!"
"In my tummy! Papa fills me up every night—it's packed!"
"......"
Silence. The lady's face stiffened awkwardly. My heart stopped.
"Y-yes...?"
"He says I'm the cutest—feeds me the bottle every night, changes my diapers! Best papa ever, right?"
Is she insane? I shoved Luna's head back into the cart.
"S-sorry! She's not well—must've skipped her meds! Haha!"
I dumped the pre-picked items onto lap-Luna and bolted. Her cackling laughter echoed from the cart.
"That was fun! See her face? Totally frozen!"
"Be quiet, please!"
Hiding in a remote aisle to catch my breath—then, click-clack, heels approached from opposite.
Frilly gothic dress. Short stature dragging on the ground. But melons stacked on her chest. Huge.
Great.
Ludel, magic department professor. Dwarf, Luna's arch-nemesis. Always scheming to steal Luna's spot.
Of all places.
Good thing Luna was disguised. As long as I wasn't spotted.
I pulled my hat low and turned the cart.
"You there."
Ludel's raspy voice stabbed my back.
"Han Si-hun, isn't it?"
Doomed. Dwarves' eyes were sharper than expected.
"Ah... Hi, Professor."
I bowed awkwardly with a forced smile.
"Fancy seeing you here. Heard you're slaving under the department head—got time to shop?"
Ludel smirked behind her fan. Her gaze slid to the cart.
Disguised college-girl Luna. Mountain of diapers and bottles.
Ludel's brow twitched.
"What's this? Adult diapers?"
"Uh... well...."
"Girlfriend? Or you? Tsk tsk, leaking at your age already."
Ludel scanned disguised-Luna top to bottom. Eyes full of contempt and mockery.
"Plain face, dumb look. Low standards? Figures—you're TA for that crazy Frost Witch."
Crack.
Veins bulged on Luna's hand gripping the cart. I pressed her shoulder hard.
Hold it. Please hold it.
"And these ridiculous items. Magic could handle this easily, no? Tsk. Tarnishes a magic student's dignity."
Ludel tapped the diaper pack with her fan.
"Well, privacy respected—but don't embarrass the school. Got it?"
"Yes, ma'am."
Go away. Please.
"Ta-ta. Got a meeting tomorrow—gonna chew out your professor. Hohoho!"
Ludel turned. Jiggle. Her massive tits swayed unnaturally as she walked.
Then—
Tap.
Luna reached from the cart, grabbing Ludel's dress hem.
"......?"
Ludel stopped, turning with an irritated glare.
"What're you doing? Filthy human hands touching—"
Luna smiled. Pure, cruel innocence. Then mouthed:
'Padded.'
"......What?"
"...Boobs padded. They're fake, auntie."
Luna's tiny finger pointed at Ludel's left tit.
Ludel's face drained of color. Her pride, her lifeblood—exposed.
"You, you... right now...!"
[And the right one's about to burst? Take better care.]
Luna's eyes flashed red. Through the illusion, her original killing intent leaked—the pressure of a 0-grade Archmage.
"Eek?!!"
Ludel clutched her chest in horror. Sweat poured.
"Oppa, let's go! Hear a mutt—er, dwarf—barking?"
Luna tapped my arm. I fled with the cart, clueless (but kinda clued-in).
"Hey!! Stop!! What'd you say!!"
Ludel's yell chased us, but too late. We escalatored to the parking lot.
==================
"Are you nuts? Picking a fight with a professor!"
"That shit-dwarf bag badmouths me everywhere."
Luna hopped out, hands on hips. Disguise off—back to silver-haired beauty.
"Dignity? Hilarious. Parading around with two slime blobs stuffed in her chest."
"Slimes?"
"Didn't know? All fake. Medical slimes enchanted with mana. I accidentally stabbed one with a needle last time—popped like a water balloon."
Luna giggled.
"She insults my man? I almost burst her pads—but held back."
My man. The words tickled my chest oddly. Bratty, tantrum-throwing, pervert—but these moments made her impossible to hate.
"Anyway, got everything. Let's go."
Luna smiled warmly as I loaded diaper boxes into the trunk. She slyly offered a shopping bag.
"What's this?"
"Gift."
No memory of buying it. Inside: luxury watch. Crazy expensive.
"......"
"Had it stashed. Can't have my slave looking shabby—ruins my image."
Luna looked away shyly at distant hills.
"It's pricey. Wear it. So no one—especially that slime auntie—looks down on you."
She clasped it on my wrist herself. Her fingertips brushed my pulse.
"Thanks."
"Thanks? You know what that means?"
Luna grabbed my hand, guiding it between her legs. Whether from screwing Ludel or the mart antics, it was already hot and wet.
"Put my diaper on in the car."
"Parking lot."
"Tinted—can't see."
Luna nibbled my earlobe. Wet breath invaded.
"Play with my pussy on the way.♡"
"Crash."
"Autopilot."
She shoved me into the back seat. Shopping done—but looks like we had more "work."