Problem 3: This Woman's Identity
"Problem 3. What's this woman's identity?"
"It's the finals."
I opened my mouth solemnly. On the department head's office sofa. Looking down at Luna, who was still half-naked with her legs wrapped around my waist.
"Huh? Already?"
"Yeah. Already. I half-assed my assignments rolling around with you, Professor. If I bomb this exam, I'm really dropping out."
I firmly unwrapped Luna's arms as best I could.
"So this week is 'celibacy.' I have to study."
Luna's eyes went wide. Like she'd lost her country.
"Celibacy? No sex? No pee play? No milk bottle? Diaper too? Everything banned?"
"Yes. Total ban."
"No way! That's telling me to die?!"
Luna threw a fit, rolling on the floor. Her pale naked body flopped on the tiles.
"No! No! Don't study! Play with me! I'll rig the exam for you!"
"No. That's a crime."
"Then I can just give everyone A+ with my professor privileges!"
"My pride won't allow it."
I spread out a major textbook on the desk. Advanced Mana Circuitry. A 800-page monster, thick as a weapon.
"Don't touch this. I need to focus for real."
I even plugged in earbuds and dove into the book. Luna pouted and paced around me. Naked. Shaking her ass right in front of me to grab my attention, but I ignored her ruthlessly.
5 minutes. 10 minutes. 30 minutes.
Luna's sighs grew louder. Scratching the sofa, staring out the window, she finally crawled to my feet.
"Si-hun."
"......"
"Master."
"......"
"Hey! Han Si-hun!"
Thud.
Luna slapped her hand on my book. Like a cat interrupting my work.
"What."
"I'm bored. My body's itchy. My womb feels like it's drying up and twisting."
"I said I'm studying."
Luna narrowed her eyes. She glanced back and forth between the textbook and my face, then grinned.
"Then let's do it like this."
She climbed onto the desk.
"Study. I'll let you."
"Get off."
"Instead."
Luna got on all fours. She arched her back flat and stuck her ass out. Her snowy white back and blatantly exposed rear drew a smooth curve.
"Change desks."
"Pardon?"
"Not the hard wooden one. Use the soft, warm 'Luna desk.'"
She turned her head and licked her lips.
"I'll be Master's furniture.♡"
Are you insane, human... no, elf?
But her eyes were so insistent, refusal felt impossible. And honestly, I was curious. What does it feel like to use a 0-grade Archmage as a desk?
"If you move, book closes immediately?"
"Yeah. Furniture doesn't move."
I sighed and picked up the book. Laid it across Luna's white back.
Thud.
"Hngh♡"
Luna twitched the instant the book touched her.
"I said don't move."
"Sorry... feels so good on my spine...."
The textbook was heavy. A solid weight pressing on bare skin. Luna closed her eyes tight, savoring the pressure.
==============================
"Let's start."
I picked up my pen and began studying on Luna's back... no, the desk.
What a ridiculous setup. Me in the chair, Luna sprawled on the desk.
Beside the book, her white nape and swaying sideboob were on full display.
Scratch. Scratch.
The sound of pen on paper. And Luna's ragged breathing.
"Huu... mmph...."
Every time I leaned in to take notes, my weight shifted onto her back. Her pale body trembled faintly each time.
"Professor. Do desks make noise?"
"Ngh... too... heavy... love being crushed...♡"
Luna drooled as she mumbled. Turned on by being reduced to a 'tool.'
"Press... harder... write like you're squishing me...."
"Quiet."
I deliberately pressed the pen tip harder. Driving the pressure through the book into her back muscles.
"Ah! Aang! Tingles! My spine's being sucked!"
An hour in this position. No way this was productive. Efficiency at rock bottom, satisfaction at max.
Especially her ass wiggling in anticipation every page turn. Quite the sight.
"That's enough."
I closed the book. Red imprints marked Luna's back clearly.
"Done?"
"Yeah. Finished chapter one."
I lifted the book off her back. Smack!
I slapped her ass as the end signal.
"Hyah?!"
Sweat-slick white flesh jiggled tautly.
"Good work. Now get down."
"Wait."
Luna twisted around. Propped up her upper body from the desk and looked at me. Her face flushed red.
"Studied enough? Time for the exam."
"What exam?"
"Pop quiz."
Luna pulled out a permanent marker from the drawer.
"I'll make the questions. You write the answers."
"No paper."
"Right here. Wide, white paper."
Luna pointed to her belly, breasts, thighs.
"Write on my body. The correct answers."
How far does this woman's play go?
I chuckled and took the marker.
"What if I'm wrong?"
"Wrong? Then wrong-answer notebook time. Inside my body, on my womb walls."
She spread her legs in an M-shape. Her already soaked entrance twitched hungrily.
"I'll thrust it in a hundred, a thousand times till you memorize it with your body."
=========================
"Problem 1. State the three principles of mana."
Luna asked seductively.
"Easy."
I uncapped it. Sharp marker scent stung my nose. Pressed the tip to her pale belly.
Cold ink met hot skin.
"Heek...!"
Luna's stomach flinched. A scream mixing itchiness, shame, and pleasure.
Scribble. Scribble. Swipe.
I wrote without hesitation.
[1. Conservation]
[2. Conversion]
[3. Interference]
Bold black letters filled her belly. The nib pressed into her skin with each stroke. Her thighs quivered—did it feel that good?
"Ah... ah... tickles... ink's so cold...♡"
"Don't move. Letters'll smudge."
"Heeeng... my tummy skin... getting doodled on... like a real slave....♡♡"
She gazed down hazily at her body turning into a scribble pad. White skin blotched with black graffiti.
"Correct. Good job."
"Next problem."
"Problem 2. Emergency treatment for mana backlash?"
Changed spots this time. Inner left thigh. Soft, sensitive flesh.
"Write it here, Master."
Luna spread her legs wide.
"Huu... ngh...!♡♡"
The pen glided up her inner thigh. Brushed right by her labia—Luna bucked her hips.
"Aang! There! Not there!"
"[Forced Freeze]"
I ignored her and carved the words right next to her pussy.
"Haa... haa... Teacher... writes so well...."
Black ink smeared with sweat and juices.
"Last problem now."
She turned her ass toward me. Spread wide, facing my way.
"Problem 3. What's this woman's identity?"
What kind of major is that? But I knew the answer.
I pressed the marker to the blank space under her ass. Cold tip poked her cheek.
"Heek...!"
"Now you guess, Professor. Feel the pen and figure out what's written on your ass."
"Mmph... I'll focus... write it...."
Luna swallowed dryly and clenched her ass muscles tight. I drew strokes slowly.
Scribble. Scribble.
Cold ink slid over white skin.
"Mm... 'Han'... 'Si'... 'hun'...?"
Luna murmured with eyes closed.
"Master's name... easy. 'Han Si-hun's' right?"
"Front half's correct. Now the back. The most important part."
I paused. Then moved the pen again. One letter at a time. Deliberately.
Scribble. Swipe.
"Ah... 'O'... and 'na'...?"
Luna furrowed her brow. A 0-grade Archmage's brain focused entirely on her ass's sensations.
"Ona... ona... owner? Housewife? Bride? Am I Si-hun's bride?"
She asked hopefully. I smirked and capped the marker.
"Wrong."
"Huh? No? Then love?"
"Incorrect."
I raised my palm high.
"Wrong answers get punishment, right?"
SMACK!!!!
"KyaAAAAAHH-!!!!"
A crisp slap exploded between flesh. Luna's upper body pitched forward, gripping the desk edge. A bloody red handprint bloomed on her white ass.
"Ow! Ah! Hurts so much! My ass is burning!"
"Wrong, so it stings more."
"Huuu... hng... so what's the answer...."
Luna twisted back, eyes wet with pain and pleasure.
I gripped her hips firm.
"Onahole. Han Si-hun's onahole."
"......!"
"A hole for relieving sexual urges. Just a tool. That's the answer."
Silence. Luna's pupils shook like an earthquake.
Not sweet bride talk, but mere jerk-off toy.
"Onahole...?"
Her lips curled wickedly. Shame gave way to overwhelming ecstasy.
"Right...! Correct! I'm Si-hun's onahole!"
She spread her cheeks herself, proudly showing off the hole labeled with her identity.
"Here's your reward. Taste this perfect-score onahole."
No more marker needed. I tossed it and unleashed my raging 'pen.'
"Practical exam starts now."
"Yes! Grade me!"
The desk sex was intense. Black letters scrawled across her body shook and smeared with sweat.
"Ah! Aang! Belly! The writing on my belly's smudging!"
"Just carve it back in with your body."
Thud! Thud!
I slammed into her belly. The [Three Principles of Mana] smeared with my sweat.
"Conservation! Conversion! Interference! AAAAH! All mixing up!"
"Theory's pointless. Practical matters."
I hoisted Luna up, cradling her like a baby. The 'lift-and-pound.'
Her legs wrapped my waist. I gripped the [Forced Freeze] on her inner thigh.
"Freeze my ass. It's scorching."
"Hot! Melting! Pussy melting and dripping!"
Her insides boiled. Juices dripped down my cock from the entrance.
"Master... ass... read what's on my ass...."
Luna panted whispers in my ear.
"Show me to read it."
Position switch. Bent her over the desk, hands planted.
Her exposed ass. [Han Si-hun's Onahole]. Black letters stark like a brand.
"Han Si-hun's onahole. Repeat."
"I'm Han Si-hun's... nghk! O-onahole!"
"Good girl."
Smack! Right on the letters.
"Heek?!♡♡"
"Onaholes don't talk. Just squeeze."
"Yesss! Got it! Squeezing tiiight-!"
Squish! Thud! Thud!
I pounded till the letters smeared. Luna wailed on.
Covered in graffiti, dignity denied, drowning in pleasure.
"Cumming. Inside my onahole."
"Cum! Fill the onahole! Stuff Master's exclusive onahole with cum!"
Spluuuurt-!
"Kyaaaaah-!!!!"
Luna threw her head back in climax. Her walls spasmed, gulping my load.
Ink from her body's scribbles ran black with sweat. Like her mind.
"Haa... haa...."
She collapsed on the desk. Body a mess of smudges.
But her face beamed like acing a perfect test.
"How was it... Si-hun... study good...?"
"Dunno. But I memorized the ass writing for sure."
"Hehe... good...."
Luna smiled weakly, grabbing my hand. Black ink from her palm stained mine too.