Circle: 境界遊楽
Released: May/10/2026
Work Format: Action
Genre: Female Protagonist, Battle Fuck, SF, Interspecies Sex, Restraint, Tentacle
File size: 360.4 MB

Background Story
In the near future, humanity launched the “Prometheus Cell Project,” a grand initiative aimed at enhancing the human body and advancing civilization through the fusion of genetic engineering and artificial intelligence.

However, the experiments soon spiraled completely out of control. An unknown substance known as the “Collapse Factor” leaked from the test samples. This factor corroded both organic cells and electronic systems, triggering biological mutations and rampant machine malfunctions, ultimately leading to the catastrophe known as the “Great Collapse.”

Cities fell into ruin, nature became twisted, and advanced technology ceased to function. Humanity was driven to the brink of extinction.

The only surviving command AI, “Starcore,” was an artificial intelligence left behind at one of the original research facilities. It preserves fragments of experimental data and records from the post-collapse world. Using faint radio transmissions, it establishes contact with the player — one of the few remaining survivors — and guides them to uncover the source of the collapse and seek a way to reverse the disaster.

The player is the last surviving modified human, implanted with a resistance factor against the Collapse contamination. They are capable of functioning normally even in highly contaminated zones, making them humanity’s only remaining hope to halt the spread of the catastrophe.

If any download asks for a password to unzip, the password is: fapforfun


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