Despite only having 47 basic CG images, the actual total CG count exceeds 500! The same scene is made more interesting through perspective switching, clothing damage, and expression differentiation: the half-covered and half-exposed sense of sanctity when the nun's clothes are torn, the contrast of tears in the corners of the eyes when the minotaur wife Beira falls into depravity, and even the "ethnic feature play" - a close-up of an elf's pointed ears reddening and sweat dripping, satisfying the detail-oriented.
Trials of interspecies Sisters~Erotic exchange with Humans~
- Release Date:
- Aug 15, 2025
- Developer:
- 瀧壺チャンネル
- Publisher:
- 072 Project
- Platforms:
- Windows
Game Tags
About This Game
✦ Summary ✦
Nun exploration RPG.
It's been half a century since the war between human and the Nonhuman Alliance.
The rift between human and nonhuman races remains deep.
Therefore, in order to deepen their relationship with humans, the Nonhuman Alliance decided to send nuns to human towns for cultural exchange.
"Erika" and the other protagonists who were dispatched will gradually lose themselves in happiness during their erotic exchanges with humans.
✦ Characters ✦
▼ Protagonist ▼

Erika (CV 星野天)
An energetic and gentle girl. But she is not very good at using her brain.
Basically, she believes in crossing the bridge when she gets there.
▼Sub heroine ▼

Marielle (CV 麦咲輪紫葵)
She is the head nun who leads the nuns in the church, and is also the teacher of Erika and Funiru.
Although she likes her husband very much, she has not had sex for decades after marriage, so she is quite sexually frustrated.
She is very concerned about her inverted nipples.

Funiru (CV 琴香)
Erika's childhood friend. Although she is afraid of trouble, she becomes very impulsive when Erika is involved.
Slightly hates humans.
✦ Various H events for the protagonist! ✦

▲Their breast milk cannot stop, so let the humans milk them!
Came using their nipples because it felt too good!

▲Offer pussy to a stranger because of hypnosis.
Pussy getting toyed to squirting!

▲Unconscious pussy play via sensory deprivation holes!
Orgasm from the accumulated pleasure!

▲Roped up BDSM as the pussy getting trained!
Crying and begging for orgasm!
✦ Multiple H scenes from the sub-heroines! ✦

▲Laying eggs!
Pussy laying eggs while having an orgasm!

▲Erotic Massage Development
✦ Information ✦
・Estimate play time: 3 to 4 hours.
・Multiple endings.
・Recall mode/H event full unlock button.
・Sound effects.
・Dub (CV 星野天) (CV 夢咲みるく) (CV 麦咲輪紫葵) (CV 琴香)
・Live2D animation is fully dubbed.
Screenshots
User Reviews
CG are excellent and lewd, gameplay is simple and H scenes are quick easy to get , and the dialogue is just right, not too long or annoying. I like it. - In an era where the struggle between humans and non-humans has ended and both sides want to coexist, they must cultivate a good relationship. Erika and two friends are sent to help mend this relationship by helping humans. Which leads to being Segs and addicted it until she become sluts and can't live without coock. Anyway need patch
No combat—just relaxing exploration to find heart events. Loads of spicy content, high-quality CGs, and some Live2D scenes. Full Japanese voice acting that sounds great. Around 3 hours for full completion—quick, fun, and satisfying.
Honestly, this update is stacked: way more heroines, tons of new spicy scenes, and every one of them is extra-steamy—pure fan-service gold. Props to the devs; they really get what we’re here for!
A fantasy erotic VN where you guide Erika – a nun from demon-kin clergy – through "cultural exchanges" with humans in a post-war world. Her corruption arc (pure piety → sensual abandon) drives the narrative across 5+ endings. 500+ exquisite CGs with species diversity (demons/elves/humans), 6 silky-smooth Live2D H-animations. Hoshino Ten’s performance as Erika (innocent → sultry) elevates every scene.
Nuns are basically 072Project’s trademark—massive assets on these sisters, every single time. The voice acting and those wild sound effects pull you right in, so definitely plug in your headphones if you wanna feel the full experience!
as always, many huge breasts, I love their company's games
I'm satisfied with the huge breasts. I'm not satisfied with the description of the evil fall. There's too much foreplay. It's too much trouble. The whole is good.
The quality of CG is very high, and the level of pornography is also very high. It's easy to play, the H scene is quick and easy to unlock, and the dialogue length is just right, not too long or annoying, which I like.
A story-driven adult game where you engage in intimate interactions with various nuns. The characters have large breasts, and the game includes voice acting.
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System Requirements
Minimum
- OS *: Windows® 7/8/8.1/10/11
- Processor: Intel Core2 Duo or better
- Graphics: DirectX 9/OpenGL 4.1 capable GPU
Recommended
- OS *: Windows® 7/8/8.1/10/11
- Processor: 2+ GHz Processor
- Memory: 4 GB RAM
- Graphics: OpenGL ES 2.0 hardware driver support required for WebGL acceleration. (AMD Catalyst 10.9, nVidia 358.50)
- Storage: 4 GB available space
FAQ
How much does Trials of interspecies Sisters~Erotic exchange with Humans~ cost?
Trials of interspecies Sisters~Erotic exchange with Humans~ costs $15.99.
What are the system requirements for Trials of interspecies Sisters~Erotic exchange with Humans~?
Minimum: Minimum: OS *: Windows® 7/8/8.1/10/11 Processor: Intel Core2 Duo or better Graphics: DirectX 9/OpenGL 4.1 capable GPU Recommended: Recommended: OS *: Windows® 7/8/8.1/10/11 Processor: 2+ GHz Processor Memory: 4 GB RAM Graphics: OpenGL ES 2.0 hardware driver support required for WebGL acceleration. (AMD Catalyst 10.9, nVidia 358.50) Storage: 4 GB available space
What platforms is Trials of interspecies Sisters~Erotic exchange with Humans~ available on?
Trials of interspecies Sisters~Erotic exchange with Humans~ is available on Windows PC.
Is Trials of interspecies Sisters~Erotic exchange with Humans~ worth buying?
Trials of interspecies Sisters~Erotic exchange with Humans~ has 88% positive reviews from 69 players.
When was Trials of interspecies Sisters~Erotic exchange with Humans~ released?
Trials of interspecies Sisters~Erotic exchange with Humans~ was released on Aug 15, 2025.
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