I think the Inyouchuu Fan Works forum is best for directly Inyouchuu related fan works, so this thread is for original stories that maybe contain similar themes, featuring original characters and worlds.

I was cruising AO3 last week through two tags and found a few so far: Bugs & Insects and Pregnancy:

Colonial Disaster (sabrinamilagre) https://archiveofourown.org/works/52277686

Along Came a Spider (aghastlyapparition) - https://archiveofourown.org/works/70894211

Spider's Lover (Anonymous) - https://archiveofourown.org/works/42264246/chapters/106121286

Vile Bedfellows (jordanvskeeterson) - https://archiveofourown.org/works/80484461/chapters/211355441

I'm chipping away at them myself and haven't read these all yet. But dumping them here for now.

Hey, I like this idea, glad you thought of it!

Admittedly I haven't just browsed AO3 in quite a long time - mostly been following a few other people's fics through subscription, other than the two I put up myself semi-recently - so I don't have much to contribute here, but I'm sure a few will appreciate this resource when they run out of official demon bugs.

I'd like to add suggestions here as well, but I'd want some ground rules about how much similarity to Inyouchuu is required

Personally, I'd consider tentacles and some kind of very large penetration/ejaculation to be non-negotiable.

Yeah, doesn't have to be too strict, but should probably have some similar themes:

~ Tentacles, Monsters, etc
~ Insects
~ Breeding elements

The ones I posted above, was still hard to find something that really hyper focused on the impreg like Inyouchuu does. But that's the story of my life haha... so hard to find other things out there quite like its ultimate combination of all the best things I love in hentai.

And alas, even Inyouchuu the Animation doesn't focus on bugs or pregnancy much at all. So maybe a caveat is similar settings, the modern school + fantastical elements with magic and demons, some good tentacle action, with very pervy sex... that might fit the bill too.

So I did a look through all my bookmarks on AO3, and these are all fics that I feel are sufficiently Inyouchuu-like. (There are more I could have posted, but I wanted to save them for a more specific Atlus-themed set later)

Lily and the Cave of Tentacles (randydaughter) https://archiveofourown.org/works/19122256/chapters/45442192

The Broken Ghost (Ovipositivity) https://archiveofourown.org/works/23304856

The Mars Breeding Project (Exxus (Endlyth)) https://archiveofourown.org/works/32357323

Alone as they are Drawing Near (Nidoranduran) https://archiveofourown.org/works/40121583

Darkest Dungeon - Game Over heroines (Foxyseven) https://archiveofourown.org/works/37822510/chapters/94440802

Warhammer 40k heroines - Game Over (Foxyseven) https://archiveofourown.org/works/51420886/chapters/129943435

The Terror of Tentacle Island (aghastlyapparition) https://archiveofourown.org/works/50885638

Broodmother of Brinstar (sabrinamilagre) https://archiveofourown.org/works/59951890

Original: Tomoe Akemi's offering (RenaisDaze) https://archiveofourown.org/works/80049571

The Bride of the Deep (ElviraMoon) https://archiveofourown.org/works/81678176

Hope everyone enjoys these (but also I hopes this doesn't distract Ellie, EchelonV, or Suiisbestgirl too much from their writing)

Haha, I'm sure that will be no problem at all. Thanks for the recommendations, I'm sure our community will greatly appreciate them!

Also, I love that name "Ovipositivity" haha

Nice haul lonesomebro! I'll have to check these out.

And yeah I should try and post my chapter 3 of the Imp story soon.

@lonesomebro: Any of those stories above or others you know of lean best into the pregnant/birthing details? Ohhhh I'm obsessed with that this year. Lol, alas I bet finding that stuff without the human/medical (gore) aspects is tough. Or then maybe it's too brief and vanilla, not as detailed for what I want...

I need more Iyouchuu licensed.

(07-04-2026, 03:23 PM)EchelonV Wrote: @lonesomebro: Any of those stories above or others you know of lean best into the pregnant/birthing details? Ohhhh I'm obsessed with that this year. Lol, alas I bet finding that stuff without the human/medical (gore) aspects is tough. Or then maybe it's too brief and vanilla, not as detailed for what I want...

I need more Iyouchuu licensed.

I wouldn't say any of them lean that hard into the birthing details. Several of them have it happening, but it's only enough to convey that it is happening (and usually that it will keep happening), not a more drawn out description like Inyouchuu tends to do.

Guess I'll have to write more of them myself!