The Melting Depths
In the sticky, melted flow of time, I drifted blankly, surrendering my body to wherever the current took me. Like a tiny potato chunk bobbing in stew being lazily stirred with a ladle.
"..."
All I could clearly remember was how warm, damp, and slick Undine's insides had felt—pleasantly so. The direct sharing of emotions and sensations between us made our pleasures resonate and amplify endlessly, yet thanks to her gentle but resilient spirit, I somehow kept one thread of awareness intact even amid the overwhelming bliss. Her sweet voice whispered constantly in my ear, letting me experience the sensation of everything melting away inside her.
Glurururururup… glub… gluck-gluck…
Surrounded by that cozy warmth, I received a relentless prostate massage through my shameful exit while my erection refused to subside, forcing endless climaxes. I tried to tense up and break the vicious cycle, but those tentacles only squeezed softly, never tearing, subjecting me to a thorough, unyielding sense of release. My mind was ravaged by a chaotic peak where discomfort and pleasure tangled together.
This pleasurable hell felt like it would last forever.
Gluck… splash…!
"Hahp, cough… cough-cough…"
Just as fear began to gnaw at me—wondering if I would simply dissolve like this—everything, it seemed, truly had an end.
"Hah… hah…"
Before I knew it, my knees were touching the floor of the containment room. Looking around in a daze, I saw the entire space filled with a glowing blue lake. What on earth had happened? I had kept thinking that both my mind and body were melting inside her, but this was as if the massive Undine herself had melted away at my command…
Splash… splash…
The blue lake covering the entire floor of the wide containment room was deep enough to reach a considerable height. When I touched it with my hand, it felt sticky yet immediately dispersed—gelatinous. Then—
"…?!"
I jolted and turned at the supreme softness pressing against my back. Well, "jolt" was an exaggeration; my tattered body moved far slower than I intended. What I saw was Undine, now shrunk to roughly my size, embracing me from behind. When her long hair brushed against me, its cool dampness made me flinch involuntarily.
"Undine… what is this…?"
'Haa… Maintaining that giant form any longer… my mind… melted into a sticky mess… This is… my limit now…'
"…Ah."
Come to think of it, the miniature Undine had never spoken—only made eating sounds and cute noises. If her body size was proportional to her mental strength, then this form meant she too was being driven to the brink by unfamiliar pleasure.
'Truly… a dangerous child…'
At a time like this, showing such a vulnerable side…
"Undine!"
Splash…!
'Kyaa…? Darling…?'
Grabbing the arms wrapped around me, I poured every last ounce of strength into shoving her backward. Splash…! Because it was her own body—now liquid—she didn't sink like I did, instead sprawling across the surface like someone lying on a waterbed. I stared intently at the way her especially large breasts jiggled.
I had seen Undine in human proportions before, but this felt different. Rather than a clone split from her main body, it seemed as though her massive form had completely melted away, finally revealing her true self.
"Ptooey… Undine, do you have any idea how embarrassed I was?"
I spat out the remaining blue liquid in my mouth and gripped her slender wrist tightly despite her voluptuous figure. Of all places, that hole… and without me even noticing, how many of those sticky tentacles had been granted free passage… My body still trembled pleasantly from the unfamiliar pleasure, and as a man, my pride felt utterly shattered—every broken fragment ground to dust.
The feeling had been… unbearably good. Yet precisely because it was so good, it was also unbearable.
'Darling…?'
Even if she looked up at me with those innocent, blinking transparent eyes and pleaded, it wouldn't work.
"…You have to take responsibility for reducing me to this state, Undine."
'Oh my…'
Strengthening our already loosened connection, I plunged my palm deep into the maternal softness that first caught my eye. The pleasant, yielding texture filled my hand completely, and the moment it sank into her body, pure delight overflowed within me.
'Ah… hng…? Why…'
When I kneaded and stirred her breasts, she mistook the pleasure I felt for her own and shivered lightly. Even though she originally lacked erogenous zones, with my ability I could make her feel anything.
"…I'll return everything you did to me."
Though it was shocking to have my rear taken by the maternal Undine who always called me "darling," if I could take something equivalent in return, it might soothe the wound to my pride. Yet nothing about her seemed stealable—until one obvious place caught my attention. I brought my face toward it first.
Chu… chuup…
When I pressed my lips to her cool, soft ones, she reacted with confusion first. But I knew exactly what a kiss between man and woman meant, and how heart-pounding it could be.
'Uup… mm, darling…?'
Along with the cool, soft sensation of her blue skin against my face, the distinct shape of her lips made my heart race. So she, too, had no choice but to mistake it for the same thrilling act.
'Wait… something feels strange…'
Undine grabbed my shoulders with both hands as if to push me away, but her slender arms—now the size of an ordinary adult woman's—offered no real resistance. Her palms were merely soft and yielding. Ignoring my pounding heartbeat, I continued the kiss to the very end. My mind felt scrambled, yet focusing on this single act helped my body cooperate.
'Mmm…'
She seemed confused at first, then flustered by the flood of emotion—until finally she began actively extending her tongue.
'…This rising feeling of excitement and joy… what is it…'
This was undoubtedly her first kiss. But a mere kiss wasn't enough to ease my humiliation. I wanted her to pay the same price I had.
As if reading my desire, after our long kiss, I pulled back to catch my breath—only for an unbelievable sight to unfold before me.
Undine, lying beneath me, spread her legs on her own. Though her appearance was identical, a smooth cleft now appeared between her thighs where nothing had existed before. A narrow, winding passage formed beyond the opening, ending in a small empty space flanked by tiny spiraling channels.
"This is…?"
Gulp.
If my health class hadn't been a waste, this shape was unmistakable. Because of her translucent body, my gaze naturally fell upon it—this was clearly what I knew it to be.
Undine's womb. Something that shouldn't have existed. This blatant message stirred every male instinct, and the moment I recalled what I wanted to take from her, the sight before me made everything clear—what she desired from me, and what I desired from her.
Soft…
The winding passage visible beyond her lower belly, looking so pleasurable, twitched invitingly even now, as if begging to know how good it would feel to be filled. The urge to push through that treacherous path and flood the precious little space at its end with my hot, thick seed surged violently.
"Undine… Undine…!"
'Darling… you want to become one with me…'
One. But what exactly did she mean by "one"?
Undine made no attempt to hide the space between her spread legs. Instead, she used two fingers to part the cleft and reveal the narrow entrance. Even though my manhood was swollen red and aching from endless climaxes, her provocative gesture instantly revived it, making it throb hungrily before the damp hole.
As with all males, the moment one mounts a female to breed is when one becomes most defenseless. So I failed to deeply consider the hidden meaning in her words. I simply nodded obediently and collapsed into her gentle embrace.
Naturally, I never noticed the tentacles rising from the shallow water behind me.