I'd say you're coming up short with only one prolapsed hole, but I suppose that can be saved for another chapter or story.

(Side note, no idea how one would write this to be erotic, but I'd like it in an Inyouchuu-esque story if there was a scene of a woman put through the wringer of demon breeding and birthing having her body restored to full functionality)

Glad you liked it. That is admittedly where my preferences come into play, I don't like prolapsed booty. lmao, love a big gape though.

Won't post pics since we don't want porn here, but I do love Polly Petrova and all her DAP craziness, but I avoid the pee and prolapse stuff she does. Maybe it ruined it for hentai to me too. lol. Some of her crazy good pictures and and naughty faces make me picture Takeru in her place.

Anyways, I have nothing for chapter 4 now so it's a blank slate. Maybe I just stick to Imp's taunts and tentacles, or bring in another higher level demon like my made up Mujy (green Nightmare basically) to play with her.

I'd be interested in Mujy showing up because I'm sort of curious whether Nightmare is out conquering Japan or if he's settled into just enjoying the school's female population and the Black Cat girls, and Mujy could clarify that as either another demon joining Nightmare's forces from outside or being one of his offspring from the Mikoto, Sui, or Takeru.

Check out Mujyuurou here: https://inyouchuuverse.net/showthread.php?tid=16

In my on and off time of RP'ing, I love using him. But sometimes get in the mood for a Nightmare-esque form, which I made a simple Photoshop of:

I like the idea of him being even more perverse than Nightmare. My insert basically...

I should clarify, I think tentacle-plugged anal prolapse is pretty hot but rare to see. This Takeru scene though:

I absolutely love that visual, the tentacles are so fat and long they're pulling her insides out like that in both holes, ringed up and probably squeeze in and out with the thrusting. So nasty! I'd love to see more of that and learn how to describe it. But it's just sublime bliss knowing above that the tentacle is stretching out her cervix and uterus so much... man oh man. Has to be the best thing ever for a tentacle. So maybe I can do that. Then Mujy has his fun.

I need to get better at faster, rapid, yet still detailed birthing details... Lol.

Very brief chapter 4 intro:

The helpless teacher had become a full time living human incubator, continually raped every hour of her imprisoned life and perpetually impregnated with an endless array of monstrous demon bugs. They were mechanical in their devious perversions and torture, she was an assembly line meat pocket for them to abuse constantly. She was either being sexually abused by the huge tentacles, or crying her faded lungs out to birth the foreign creatures out. There was no break in between, the creatures and Imp made that so.

Everything increasingly heightened. Her rapid labor pains and contractions were surreal in how explosive and intense they had become, making her vision a blurry mess and brain mush. Her water breakage was a constant mix of burning semen. She had little control over her prolapsed uterus danging out of her vagina walls, as the thin tentacle wrapping tightly around its base was basically permanently tied around her birther tunnel, stinging her at microscopic levels with every bit of her uterus the tentacle squeezed. She could only endure the bugs taking their sweet time squeezing through her stomach and womb, out her dangling female organ, painfully and slowly. It wasn’t just the physical difficulty that was worse, but all the maggots and grub she excreted had become much larger.

Her literal cervix had become the prime flesh hole to rape. No matter how much it dilated and gaped to pinch off the fat bugs, the organ usually sealed up tightly after a minute or so, making every single tentacle that drilled her as such a brutal surreal fucking, along with all full births or bundles of maggots needing to be squeezed out of her a struggle.

[New tentacles have to start smaller to enter her cervix, but puff out and fatten up greatly once inside. Enter Mujy. Like a cross between perverse Imp and stoic Nightmare. Horse cock with musk waffing into her nostrils even a bit away from her. Uncut equine shaft so sensitive, even more to a sublime prolapsed uterus/cervix to fuck. Despite being horsedemon, cock full of bugs? White magma semen, burning her insides. Largest bug birthing.]

This part seems kind of redundant. I think it would work better if you elaborated on what sadistic goal is being acheived by the tentacle (is it keeping her uterus from being pushed back into her vagina? Just causing confusing orgasmic pain for its own sake? That sort of thing)

A and B.
Good idea to elaborate on that. These are definitely scraps so they're subject to change a lot.