I’ve Been Reincarnated as a Tentacle Slime~ I Want to Live a Comfortable, Secure Life and Do Whatever I Want~ - Chapter 29

While exploring floors 4 to 6, it’s time for the regular br3ast development session since it’s her third day of pregnancy. Today, I’ll also focus on urethra development.

“Rio, it’s b00b time.”

I purposely left my words incomplete, but I wonder whether she’ll take it as development or milking?

“I’ve been waiting for this! Since today is the third day, I knew it would happen!!”

Ah, she was expecting this. It used to be flat, but now if she pushes them together hard enough, she can create a bit of cleavage.

While I was lost in thought, Rio had taken off her clothes and was waiting for me to move.

“First, let’s begin with the usual milking.”

Rio’s br3asts seemed to be already anticipating it, being slightly erect. With br3asts that had grown to about a B cup and had a soft feel, the slightly larger n1pples trembled, as if wanting to be sucked.

The tentacle was made thin like cilia, and it started to invade from the n1pples into the br3asts, reaching the milk ducts.

“Mmm… are you going to suck it up from inside my br3asts today? Hah…”

“Yeah. I want to suck up every drop of milk from inside your br3asts.”

The tentacles spread all the way to the mammary lobules and br3ast sacs, sucking dry the sweet milk that had accumulated inside.

“Ahhh… I can feel my br3ast milk being sucked up… Mmm! I can tell… Hah, my Master’s exclusive br3ast milk will be gone…”

I suck out all the br3ast milk, which has become more than twice the amount from the beginning. Then, in place of the br3ast milk, I fill the ducts, lobules, and the br3ast sac with tentacles.

“Master’s taken up residence inside my br3asts. Phew… What are we going to do today?”

“Now, even scrubbing the inside of your br3asts should make it feel good.”

I create a n1pple brush with the new tentacles and press it against her n1pple.

“When it feels that good, my n1pples get bigger…”

Rio, looking anxious, doesn’t seem to like the n1pple brush very much. It’s no wonder, since her n1pples that were originally as small as a grain of rice has, within less than two weeks, enlarged to the size of a soybean, about the size of an adult woman’s n1pples.

“Everything’s fine, I’ll make sure it doesn’t get any bigger from now on. I’ve already made it smaller a few times, so the size shouldn’t be an issue. This size is what I think is best.”

With careful adjustments through predation, it can shrink back to its current size, even if it grows as big as a thumb.

“Is that so? Then I’m glad. Please make me feel good as much as you can.”

Feeling reassured, Rio let her body relax.

I slowly start rotating the n1pple brush. I attach tentacles to her chest and move them to knead her br3asts. In an instant, the n1pples become erect, getting harder and harder.

“Ahh♡ It feels so good♡♡ The tip is being rubbed down♡♡”

I stop the brush on one br3ast, firmly grab the n1pple and pull. Then, I pinch the n1pple and squeeze it tightly.

“Ahh♡♡♡ Rubbing while pinching――――nnnhhh!!! I can’t handle it♡♡♡♡♡”

With her n1pples developed to the level of her cl!toris being attacked at two points, and Rio immediately reaches a n1pple orgasm. Along with her orgasm, her milk ducts filled with the cilia tentacles, starting rotating and pistoning. The goal is to make her brain mistake the pleasure of her n1pples for the pleasure of the milk ducts.

“Hee♡♡ Master is rubbing inside my br3asts♡♡ It’s strange, but it feels better than before♡”

Filling the milk ducts with mucus, the duct brush gradually enlarges the ducts. The tentacles that entered the lobules and br3ast pouches also release mucus, and with the tentacle brush, they slowly expand as well.

“Ahhh♡♡♡♡ Master is getting bigger inside my br3asts♡♡♡ Rubbing it, and when it gets bigger, it starts to spurt♡♡♡♡ It’s going to ejaculate inside my br3asts♡♡♡”

“Do you want to be ejaculated inside of that much? Well then, I’ll let it out for you.”

I increase the rotation of the n1pple brush, make the tentacles on the chest vibrate, and begin pistoning the milk duct tentacles back and forth. Rio suddenly reacts, her hips bouncing from the sudden thrust.

“Ahhh♡♡♡ Don’t do it so♡♡ so suddenly♡♡ It’s no good♡♡♡ Aaaaahhhhh!!!♡♡♡♡ Haa♡ Haa♡♡ Mmmmmm♡♡♡♡ I can’t take it anymore♡♡ I’m cumming♡ You’re fucking the inside of my b00bs♡♡♡♡♡ I’m cumming♡♡♡ Mmmmmmm–!!!!!!!!!!!♡♡♡♡ Ahhhh♡♡♡”

“I’m going to ejaculate inside your b00bs!”

Spuuuuurttt――――

Semen is spurting into the milk ducts, milk lobules, and br3ast sacs. Since the br3asts are already filled to the brim with viscous mucus, they can’t handle the amount of ejaculation, and semen bursts out from her n1pples. It overflows in large amounts, similar to when milking a cow. The amount of ejaculation is even greater, and the milk ducts, br3ast lobules, and n1pples are tightly stretched.

“I’m cumming♡♡♡♡♡ My br3asts are squirting♡♡♡ I’m cumming♡♡♡♡♡♡”

Rio reaches a deep climax, making her show an orgasm face inappropriate for a young girl, her body convulsing.

Naturally, it wouldn’t end in just one go, and despite Rio convulsing, the n1pple brush and milk duct pistoning are resumed.

“Aah, aah, aah, aaah, aaah, aaah ♡♡♡♡♡♡ — Ahii ♡♡♡♡”

Rio loses consciousness from the overwhelming pleasure.

Since Rio fainted, the internal development and expansion of the br3asts grow more intense. The pistoning in the milk ducts becomes more aggressive, and the rotation and speed accelerate to the point where pain is almost unnoticeable. Then, mucus is injected into the newly branched milk ducts that have been developed, softening them like rubber. The tentacles push into the softened milk ducts, forcibly stretching them until they are stretched deep enough for the mammary gland lobules and br3ast sacs to grow.

Over the course of about an hour, dozens were forcibly developed in the same fashion. With this pace, she can expect a growth to a C to D cup.

Next, the expansion of n1pple’s br3ast opening begins. Since the inside of the br3asts has been filled with mucus for a long time, it stretches easily. One tentacle is thickened to about the size of a toothpick, and it is used to widen the br3ast opening while pistoning. The n1pple itself has grown as large as a pinky finger, so it should be possible to make it a bit thicker. Each time I rub her n1pples with the brush while pistoning, Rio’s hips twitch, and she squirts a burst of fluid.

While developing the br3asts, I extend tentacles to her cl!toris and urethra.

First, I trail a circular brush-like tentacle, the same as the ones used on her n1pples, over her cl!toris. Then, as the rotation begins, I insert a pinky-sized, slime-covered tentacle into the urethra.

“Aah, aah, aah, aah♡♡♡♡♡♡♡ C-Cl!t-chan♡♡♡♡ I-I’m cumming♡ I’m cumming♡ I’m c-cumming♡♡♡♡♡”

Rio is forced to regain consciousness through a three-point brush assault targeting her n1pples and cl!toris.

“Aahhh♡♡♡♡ My pee hole♡ Squelch squelch♡♡♡ It’s being done to me♡♡♡”

From the gap of her urethral opening, a gush of fluid spills out, and her hips tremble uncontrollably. Rio’s face is soaked with tears and drool, while her fox ears twitch and spasm.

After squirting, I understood the path from the urethra to the fluid’s route. As I piston, I branch the tentacles and arrive at the spongy tissue that produces the fluid. Then, I thrust the tentacle into the corpus cavernosum and start injecting the fluid. The G-spot nerves become increasingly sensitive, and the corpus cavernosum swells, growing bigger and bigger.

“Nn-nn-nn, ooh-ooh-oohhh♡♡♡♡♡♡ Inside my pee hole♡♡♡ P3nis♡♡♡ So much♡♡♡♡”

Next, I applied vibrations to the tentacle inside the urethra, while expanding the strokes to larger ones as urethral s3x begins, from the urethral opening all the way to the bladder. I peel back the skin of her cl!toris and apply the brush directly, causing a gush of love fluids to spill out from her v4g1na.

“Aahhh, aahhh, aahhh—♡♡♡♡♡ Kyaaa♡♡♡”

The intensity of the stimulation was so strong that Rio passed out again. Foam poured from her mouth, and her tail stood erect like a rod.

I wrapped a tentacle around her tail and stroked it as if I were rubbing a p3nis. Rio twitched and convulsed even more, looking like she was in absolute pleasure.

Inside the br3asts, the ciliary tentacles, along with the cotton-swab-sized tentacles on her n1pples and the pinky-sized ones pistioning in the urethra, while the brush ones rubbed the n1pples and cl!toris, while stroking the tail with another tentacle, relentlessly teasing until both the inside of her br3asts and urethra became erogenous zones.

“Ahhh—♡ —Ahh!♡ —Ah!♡ —Kyaaa!♡”

How much time had passed… Rio repeatedly lost consciousness and woke up, and now, every time she orgasms, the only reaction she has is a faint twitch.

The cl!toris also swelled up to the size of a soybean, and a tentacle about the size of a thumb was thrust into the urethra. The corpus cavernosum that creates fluid continued to be injected with slime, growing many times larger as it enveloped the area around the urethra. The urethra had been ejaculated into multiple times, and semen was stuck everywhere, with the bladder containing a murky mixture of Rio’s urine and my semen.

“Ah, Rio. I’m going to ejaculate again.”

I ejaculated into Rio’s urethra and bladder, turning the mixture even whiter. As if in response, Rio’s squirt overflowed. The amount was extraordinary, flowing out in such large quantities that it was as if a glass of water had spilled.

I was excited by Rio’s flood of squirt and started pistoning in her urethra.

“Rio, I’m going to cum again.”

When I ejaculate again, Rio’s squirt overflowed like a flood.

While this happens, the bladder is filled with the mixed liquid, and yet, it continues to expand in an attempt to hold more. I continue to ejaculate into Rio, whose body remains so steadfast. And then, as her bladder swells…

This is the last one.

The final large ejaculation is forced into the bladder. The bladder expands endlessly, completely filled with a mix of urine and semen. Then, as the tentacle is pulled out, it gushes out like a wave, with Rio’s pee hole leaking a large amount of white semen.

Stopping the brush, I withdraw the tentacle that had been inside her n1pples, and Rio only slightly twitches, covered in mucus.

I cleanse Rio’s body and return the enlarged cl!toris and n1pples to their original size before laying Rio down. Additionally, I’ll mention that even after returning to normal, there is little to no change in sensitivity or the expansion of the br3ast openings.

This time’s results:

・By the time she gives birth, Rio’s br3asts will probably be around a large C cup in size.

・I think urethral play and double n1pple fvck might be possible soon.

Chapter length 4422 characters.