My Muscle Slave is a Ren'Py visual novel by FMG-Smug, presented with AI-generated 2D CG art. It follows a father and son who purchase a muscular slave girl from a market for farm labor. As her body changes rapidly, their fascination and desire for control turn into a dark, sensual struggle over power, ownership, and the shifting lines between master and servant. The story lets you follow either male protagonist, with themes of female domination and male domination shaping the choices.
The current build is v2.0, released May 22, 2026, and development is ongoing. It runs on Windows, Linux, and Mac in English, with no censorship. Update 2.0 fully separates the father and son paths after the festival scene, so players see only content for the route they chose. It also adds extra scenes to both routes, while the changelog says further scenes are already in progress.
Developer's description
In this dark and sensual tale, a father and son buy a muscular slave girl from the market to help with farm work. However, as she begins working on the fields, she starts to grow more muscles at an alarming rate.
The girl's transformation sparks both fascination and lust in her owners, but also raises questions about their morality and desire for control. As she becomes increasingly powerful and alluring, they must confront the consequences of owning another human being and the blurring of lines between master and servant.
Will the father and son succumb to their desires or find a way to tame the beast that is growing within the muscle slave girl?
v2.0
What's new in Update 2.0?
Father and son paths are now fully separated.
From the scene after the festival onward, you will only see content for the path you chose. No confusion. Just your story.
Below is a screenshot showing exactly where the separation begins.
Additional scenes have been added to both routes to make each path feel richer and more unique.
More new scenes are already being written.
This is a big milestone. Ten updates of work and listening to your feedback.
v1.8
SENSUAL & STRONG – From tender moments to fierce emotions.
TEASING & FLIRTY – The tension’s real… and it’s heating up.
MUSCLE GROWTH – Power up and own the scene.
HOT SCENES – Oh, you know the drill.
FIGHTING? MAYBE… – Let’s just say: come ready.
v1.7
HATER-FIXED STUFF– All those "things" they cried about? GONE.
YOUR SURVEY REQUESTS, LIVE IN-GAME – More choices, hidden scenes, and story twists YOU demanded!
BRANCHING PATHS SO WILD, THEY’LL MAKE YOUR HEAD SPIN – Miss a choice? Good luck seeing everything…
EXTRA SCENES SO HOT, THEY’RE BASICALLY ILLEG*L – Only Patrons got ‘em behind paywall.
⚠ WARNING:
START FRESH or risk getting errors. This story’s evolving—WITH or WITHOUT the doubters.
v1.4
DELICIOUS NEW SCENES
– Get ready for the heat!
MORE EPIC STORY
– The adventure just got even wilder!
MINDBLOWING TWISTS
– Trust us, you won’t see these coming!
GAME-CHANGING CHOICES
– Your decisions have
BIGGER consequences
than ever!
SURPRISES YOU DIDN’T EXPECT
– Oh, we’ve got some tricks up our sleeve…
v1.3
Steamy new scenes!
More of the thrilling story you’re hooked on!
Shocking twists that’ll leave you breathless.
Deeper decisions—your choices shape the game like never before.
Unexpected surprises that’ll blow your mind.
v1.2
More of the epic adventure
you love!
New story twists
that will keep you on the edge of your seat.
Deeper choices
with bigger consequences—your decisions matter more than ever!
Fresh surprises
you won’t see coming…
v1.1
More of the epic adventure
, the introduction of new characters, and the protagonist’s journey of learning a new skill! Will she rise to the challenge?
v1.0
initial zone release
Player reviews
Player rating4.0 / 5 · 5 ratings
Written reviews5 · avg 3.0★
Positive (4–5★)60%
Latest review2026-03-28
What players say
Mixed: some praise characters and AI art, while others criticize inconsistency and pacing.
5★1
4★2
3★0
2★0
1★2
Players like
Character choices and personalities appeal to some players.
Some players like or tolerate AI-generated art.
The premise and potential attract some reviewers.
Common complaints
AI art and character styles are inconsistent.
Some players criticize content timing or variation.
Some players report bugs or unfinished presentation.
Best for players who tolerate AI art and want FMG content.
Summarised from 5 written player reviews.
The_Thiccness2026-03-28★★★★★
I enjoyed the game, far from the worst AI game. I liked the waifu choice. From what I can remember(finished it a month or so ago) there is ALOT of AI used here but I didn't hate it and I'm…
DragonDickZorc2025-07-05★★★★★
It's genuinely the worst H-game I've played in a while. The plot has a moderately interesting theme, but it's poorly told and has too much filler where nothing relevant happens. The fetish I'm supposedly playing the game for (FMG) comes…
Reficul2025-06-28★★★★★
Version 1.7 The main characters are interesting and not just one-dimensional, but sometimes act a bit surprising. The main heroine Nuko is very cute as well and my personal favorite. The thumbnails gave me more of a Roman culture at…
★★★★★(5)
