Determinable Unstable -v0.2.0 Pilot- -ray-kbys- |top| Jun 2026

For those interested in experiencing the demo, it is still archived and discussed on platforms like VNDB and various gameplay channels on YouTube .

Developed by the enigmatic , this version advances the core concept of a "determinable" yet "unstable" system, offering a complex, high-stakes environment where every choice has a cascading effect on the simulation's stability. What is Determinable Unstable -v0.2.0 Pilot-?

: This denotes a lack of stability, suggesting volatility, unpredictability, or a tendency to change suddenly. Determinable Unstable -v0.2.0 Pilot- -Ray-Kbys-

: While limited in the pilot, you can take Fia to certain locations outside to observe how she reacts to the environment and "normal" people. Transformation Paths

To understand Determinable Unstable , one must first look at its creator, Ray-Kbys. Known in game databases as the developer FreakilyCharming, Ray-Kbys is best known for the immensely popular Teaching Feeling , a game that introduced many to her specific thematic world. She is originally a Japanese illustrator living in America, with active presences on Pixiv and DeviantArt. For those interested in experiencing the demo, it

Like other Ray-Kbys titles, the "Pilot" focuses on choice-driven dialogue and gradual bonding (or tension) with the creature. It is intended to test the "determinable" and "unstable" nature of the protagonist's relationship with a non-human entity.

Determinable Unstable is a monster girl visual novel (VN) featuring adult, high-content (18+) elements, created by (associated with Ray-Kbys ). Unlike standard dating sims, Ray-Kbys’s works—such as the widely known Butterfly Affection —often focus on the slow, intense cultivation of trust between a human protagonist and a non-human, often monstrous entity. : This denotes a lack of stability, suggesting

is an adult indie visual novel developed by Ray-Kbys (also known as FreakilyCharming), the creator behind the cult hits Teaching Feeling and Butterfly Affection . This "Pilot" version serves as a short side project and conceptual prototype rather than a full game. Core Premise and Plot

Versioned as a "pilot," this release is a prototype—a call for experimentation. It invites participants to interrogate the fragility of systems that claim to be "deterministic" while existing in inherently unstable environments, from quantum fluctuations to human decision-making.

On the surface, building a product on Determinable Unstable appears professional suicide. However, early adopters identify three compelling niches: