Synopsis
Summary
You’ve been given a very important task by Amilia, the biggest crime boss in the country. She’s granted you your own turf, and your new job is to use sl*ve girls to turn it into the best monster farm around! If you can make a certain amount of profit in 50 days, you’ll earn her respect and become a made man.
* There are some differences between the demo and full versions. (Game balance, UI, etc.)
Game Characteristics
Get monsters’ seeds via mating!
Raise money by selling the monster babies!
Harvest your sl*ves’ breast milk and develop their bodies to uncover special traits!
Make the most of your sl*ves by putting them to work in the brothels!
Sl*ves and Monsters
There are 8 different types of sl*ve, and 5 different types of monster!
Some species will have alternative appearances and traits.
Mix and match, breed and hatch!
Combine monsters and sl*ves of varying types to breed the best products!
Operate within and outside the law!
Manage a legitimate brothel to finance your more monstrous undertakings…!
Helpful NPCs
There are several NPCs who will help you expand your operation. They may even have some special goods or services available just for you…!
H scenes animated with Spine 2D
Over 50 sex animations created with Spine2D!
| Circle | team APPLEPIE |
| Tags | R18, Simulation, Voice, Music, Application, Chinese Simplified, Korean, Japanese, English |
| Price | 1,980JPY |
Editorial Review
Monster Black Market occupies the profitable overlap between resource management simulation and adult fantasy breeding games—a saturated subgenre that benefits from a clear economic structure and multiple progression vectors. The 50-day deadline creates genuine tension in what could otherwise feel like aimless grinding, positioning this alongside time-limited farming simulators rather than open-ended sandbox designs.
The distinctive pull here is systemic variety rather than narrative depth. Eight slave archetypes paired with five monster types creates a combinatorial breeding matrix that encourages experimentation across multiple playthroughs. The game doesn’t hide this: it’s explicitly about optimizing cross-type reproduction for profit, with body development mechanics (particularly the lactation harvesting system) functioning as both content and economic resource. The dual-track operation model—legitimate brothel fronting illegal monster farming—suggests the developers understand the appeal of straddling risk and reward, though the synopsis cuts off before explaining how meaningfully these systems interconnect. Voice work and multilingual support across Japanese, Korean, Chinese, and English indicate a deliberate regional reach, unusual ambition for a niche title.
The simulation mechanics appear robust enough to sustain interest beyond novelty: breeding variations, trait inheritance systems, and multiple revenue streams suggest gameplay depth beyond clicking through predetermined scenes. However, the synopsis’s truncation on the “operate within and outside the law” mechanic raises questions about whether moral agency exists or if this is simply flavor text wrapping deterministic progression.
This appeals specifically to players who engage with adult games primarily through systems optimization and collection completion rather than narrative immersion or character attachment. Those seeking atmospheric worldbuilding or complex relationship arcs should look elsewhere; those who’ve exhausted standard farming sims and want their resource loops infused with explicit content will find competent mechanical design here.
Solid systems engineering applied to a deliberately transgressive premise—competent if not revelatory.
Get “Monster Black Market” on DLsite
English Version → Free TrialJapanese Original
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Related Tags:
R18 | Japanese | English | Simulation | Application
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