I Met Her First
My thick fingers, coated in mana, forced open a passage in Undine's groin, carving out a tight vaginal canal.
"Haaah... pussy feels so good... More, do it more...!"
Squelch, squelch, squelch—
Pulling her small body close, I slowly licked her ear while whispering a detailed description of what a woman's private parts should look like.
"I'll do whatever you say... just don't lick my ear, please...!"
I took her soft earlobe into my mouth, rolling my tongue over it while relentlessly thrusting my fingers inside her newly formed slit. The springy, gelatinous texture of her flesh pressed against my fingertips, and with every thrust, the folds of her passage began to take shape, growing more defined.
"Look at that. You made the folds just like I told you to."
"Please keep fucking it... I did what you asked..."
"There's still one more thing left!"
Pressing my middle and ring fingers tightly together, I scooped and thrust inside her as if ladling out water. Undine's back arched violently, and a torrent of fluid began to spray from her opening. To think she would scatter her precious spirit water so carelessly—she needed to be punished.
"Ahn... I'll make a womb...! Just keep stretching me...!"
Through her translucent abdomen, I could see an inverted triangle—a womb—slowly taking shape just above her canal.
Since she was being so obedient, I picked up the pace, mercilessly hammering my fingers inside her.
Splat, splat, splat, splat.
"Ah...! No...! It feels too weird...!"
Undine shuddered violently, spraying another heavy gush of fluid. As she did, her glowing Spirit Core materialized clearly inside her newly formed womb. I pulled my fingers out and gently stroked her plump, springy mound.
"Look at this. Your messy Spirit Core is completely exposed inside your womb."
"...No, it's not...! It's only because you keep teasing me down there...!"
"You want me to touch it, don't you?"
I balled my hand into a fist, pressing it firmly against her mound. Feeling the blunt pressure of my knuckles against her opening, Undine shook her head frantically.
"No, no! You can't touch that! Not my Spirit Core—ah, hyah?!"
Straightening my fingers into a sharp spear, I drove them deep into her opening with a powerful thrust.
Her abdomen swelled as my hand slid in smoothly without a single hitch. I scraped against the newly formed folds of her canal, slowly advancing toward her womb.
"Mnh... ah...! No... stop, please...!"
"But your body is saying something else entirely."
As the tips of my fingers brushed against the entrance of her womb, the tight ring of flesh clamped down hard, sucking at my hand like a desperate, lingering kiss begging for more. I pried open the clinging cervix and slowly slid my fingers inside.
"Ahn... ah...! No...! Only my contractor is supposed to touch this... I shouldn't let you...!"
I curved my fingers into a hook and aggressively clawed at the sensitive walls of her cervix.
"Haaahn...! Ah...! No, stop...!"
"Should I pull out then?"
Slide—
"Huh...? Ah...?"
I abruptly yanked my hand out of her womb, presenting my dripping, wet forearm to her face while gently gripping the back of her head with my other hand.
"There, I pulled out. Happy now?"
"U-Uh... mnh..."
As I guided her head toward my dripping forearm, she instinctively stuck out her tongue and began to lick up the fluids she had produced. I wondered if that counted as her own arousal fluids.
Lick, lick.
Slurp... slurp...
"Still, I'm a bit disappointed in you, Undine."
Undine, who had been licking the fluids while casting anxious glances at me, flinched at my cold words. She immediately clung to my forearm, looking up with wide, pleading eyes.
"W-Why...? I promised I'd be a good student... Please? I'll try harder...!"
"You asked me to teach you, but then you started throwing a tantrum and telling me to stop."
"But that's... only my contractor is allowed to touch—ah?!"
Brushing her hands aside, I channeled the last remnants of my mana into my fingers, hooked them inside her opening, and yanked her toward me. Losing her balance, Undine was dragged forward by her very core, collapsing right into my chest.
I twisted and pulled at her sensitive mound with my hooked fingers.
"Ah...! No...! Don't pull it like that...!"
"We agreed you wouldn't complain while learning, didn't we?"
"But... if you keep touching me there, I'll end up becoming Casanova's spirit...!"
"Then just become mine."
"I can't...! Sein is... waiting for me..."
"You only need to be my temporary spirit while you're learning, Undine."
"A temporary... spirit?"
I slipped my fingers out and lightly patted her plump mound, continuing the conversation in a soothing tone.
"If you learn how to do it properly, as if we actually had a contract, Sein will like it even more when you do it with him later."
"Ah... don't talk to me while patting me there... please..."
"Just for now, while you're learning, I am your Master. Understood?"
"I shouldn't... ah..."
"Answer me!"
Slap, slap, slap.
I slapped her mound firmly, demanding an answer. Completely overwhelmed and unable to think straight, Undine could only squirm, drool pooling at the corner of her lips.
"Since it's... temporary... since it's not a real contract..."
"I'll teach you exactly how a spirit can please her Master. That's what you wanted, isn't it?"
"What I... wanted... ah..."
I slipped my tongue into her ear canal, commanding her to ask for it herself. Trembling from the intense stimulation, Undine shook her head weakly before finally giving in to my command.
Spreading her legs wide like a crab, she used her own hands to pull open her entrance—which had been thoroughly sensitized by my mana—and whispered softly.
"...Until I have learned... every way to please my Master... I will serve Master Casanova as my lord..."
"And?"
I lowered my trousers, presenting my rock-hard erection pressed flat against my stomach, prompting her for the next part.
"Please... fill my messy womb... with Master's warm seed..."
"Good girl."
I took slow, deliberate steps toward Undine, who sat with her legs spread wide, wearing a dazed, trembling smile.
With every step I took, her gaze remained utterly locked onto my cock.
Grasping my erect shaft, I pressed the tip firmly against her lower abdomen. Through her translucent skin, her glowing Spirit Core shuddered in response to the heavy pressure of my glans pushing against her belly.
"Remember, this isn't a real contract. I'm just your temporary Master until you've learned everything for Sein's sake. Got it?"
"Yes... for... Sein's sake..."
Wait... how is this... for Sein's sake...?
Looking down at Undine, who sat with her mouth slightly agape as she waited for my cock, I whispered softly.
"This is going to be on a completely different level from any semen you've swallowed or fingers you've taken so far."
"Yes... I'm... looking forward to it..."
Slurp, slurp.
Her wet, glistening opening clung to my tip, greedily sucking it inward. I had only taught her the basic anatomy, but it seemed Undine possessed a natural talent for being a submissive female.
Squish—
As my thick shaft parted her hot, tight folds and began to sink inside, Undine's hips shuddered violently.
"Ah...! Haaahn!"
Like a mole burrowing through the earth, my angry glans slowly carved a path through her freshly opened canal. I watched as her impossibly tight slit gradually swallowed my massive shaft, inch by inch.
"It feels like... my whole body is being impaled..."
Her tongue lolled out, her speech slurring into incoherent babble as her slender hips trembled with a dazed smile.
I pinched her protruding tongue between my fingers and pressed my own tongue against hers.
Driven completely out of her mind by the sensation of my cock impaling her, Undine didn't even realize what I was doing, entirely consumed by the rhythm of her own breathless moans.
"Ah... it feels like my very soul is being pierced... I've never felt anything like this before..."
"Are you glad you're learning?"
"Yes... please teach me every single day..."
Schloop—
Through Undine's translucent abdomen, my shaft finally met an obstacle and came to a halt.
The plump, triangular entrance of her womb clamped down tightly around my glans, trying to block my entry, but it was entirely futile. Feeling her cervix desperately sucking at my tip, I slowly drew my hips back.
"Mnh... more... put it deeper..."
"Just wait a second."
"No... you have to put it all the way in... deeper..."
Feeling my cock slip out as I pulled back, Undine tried to push her hips down to follow it, but I grabbed her pelvis and held her firmly in place. Suspended slightly in the air, she kicked her legs in a desperate attempt to reclaim my length, but she was suddenly forced to freeze.
Plunge!
Just as my tip was about to slip completely out of her opening, I drove myself back in with all my might.
My shaft sliced straight through her canal without a single hitch, slamming hard against her cervix with a wet, heavy thud. I could see her tightly closed womb trembling violently under the brutal pressure of my glans.
"Ahhh...! It's all the way inside...!"
Looking down at my glans crushing her cervix, Undine placed both hands over her lower stomach, staring at her own shimmering Spirit Core.
"At this rate... my Spirit Core is going to taste Master's seed and start begging... It'll want to form a real contract with you..."
"Then we can just make it official."
"No... you're only my temporary Master..."
"I said, we can just make it a real contract!"
Squish, squish.
I began to pump into her with earnest, heavy thrusts, pulling almost all the way out before slamming back in to hammer her cervix. Undine thrashed her head wildly, screaming at the intense friction.
"Yes...! I'll take Master's seed and contract with you...! I don't care anymore...!"
"You can just contract with me and help Sein, right?!"
"That's right... Sein... Sein..."
As Sein's name left her lips, a faint glimmer of clarity returned to her hazy, unfocused eyes.
I knew she would reject the idea of a contract if she were in her right mind, so I had deliberately brought it up while pounding her, trying to brainwash her while her senses were overloaded. But hearing Sein's name had surprisingly snapped her back to reality.
"That's right... I was supposed to contract with Sein... ah?!"
"How dare you speak of another man in front of your Master!"
Grabbing her floating hips, I lifted her off my shaft and slammed her back down with brutal force. Her springy womb was crushed mercilessly against my glans.
"Ah...! Oh...! H-Hyah...! But you were the one who brought it up...!"
Lifting and slamming her light body as if she were nothing more than a living sex toy, I drove her completely over the edge. Her eyes rolled back, her mind utterly shattered by the overwhelming sensations concentrated in her groin.
"Ah...! Haaah...!"
"How does your Master's cock feel? Tell me."
"It keeps hitting my precious Spirit Core... At this rate, my core is going to permanently memorize Master's seed..."
"And what happens if it memorizes it, huh?!"
"Even if I form a contract with someone else... my Spirit Core will always remember its true Master..."
So she can cuckold him while pretending to be his spirit? I closed my eyes for a moment, imagining Sein overjoyed, thinking he had successfully contracted with Undine. Then, I pictured myself appearing before him, taking Undine away while Sein desperately ordered her to return—only for her to ignore him completely as he watched in despair.
Twitch.
Though my shaft was already swollen to its absolute limit, a burning heat surged from my groin—a clear signal that I was about to blow. It wasn't a real human vagina, but the sheer psychological thrill of the situation was bringing me to the edge much faster than usual.
"Then I'll just have to make sure you remember it forever, won't I?"
"Ah...! Really? You're going to...?"
"You need to learn how to take it beforehand so you can use it later, right?"
"But this... once I learn this, there's no going back... ah!"
"You never know, right, Undine?"
I pressed hard against her cervix, staring down at her with a gaze thick with lust. Our eyes locked, and as if possessed, we clung to each other tightly. Wrapping her arms around my neck, Undine cried out.
"Yes...! I have to learn it...! Please, fill me up, Master...!"
"You're a very fast learner."
"Hehehe..."
Burying my lips against her ear, I whispered softly.
"I'm cumming."
Her twitching cervix finally surrendered to the battering ram of my cock. The tight opening parted, vacuum-sealing itself perfectly around my glans.
"Fill me until I burst... please, Master..."
Hearing her sweet whisper, I finally released the tension in my hips. Yielding to her tight, pulsing canal, my cock erupted, shooting thick jets of semen deep into her womb.
Spurt, spurt!
"Ahhh...! Ohhh...!"
Undine thrashed, clawing at my back as my seed flooded her womb like a rushing river. The thick fluid slowly began to dissolve, absorbing directly into her Spirit Core.
Every single drop of my semen was completely absorbed. Her swollen womb gradually shrank back to its original size, leaving only her Spirit Core floating inside.
But unlike before, the Spirit Core inside her womb had transformed into a distinctly dark, murky sphere. The pale, light-gray core had turned completely blackish-gray after drinking in my seed.