This depends entirely on the developer. The term "mating season" is often used as a euphemism for adult content, but not always. Some games treat it purely as a biological simulation (like WolfQuest or Ecosystem ).
The developer, LoveOS Games, typically offers the game through a "Pay What You Want" subscription-based model
While exact system requirements for v0.2 aren't explicitly detailed in the search results, we can infer some baseline expectations based on the fact that it's a 3D game:
: While known for commercial releases, Steam features a massive library of free-to-play visual novels and narrative simulators.