Equellum/Fabula: Carmen Cygni is an adult RPG developed by Rozen focusing on a story-driven fantasy plot involving a "futanari horsegirl" navigating the town of Umikaze. The 0.4.x.x cycle (Centaur Plains Update) introduced new chapters, the Centaur Plains area, new party members, and a rework of the Maruzone Shrine. Detailed development updates and content descriptions can be found on Gaikiken's Fanbox page .

    1. Lyra – A mute jockey who communicates through a battered viola. Her swan-song manifests as musical puzzles.
    2. Thorne – A cynical beast-doctor who claims the Equellum are not animals but exiled gods. His route explores bodily horror and veterinary ethics.
    3. The Gaiki – Not a route, but a presence. In v0.4.1.0, the Gaiki appears only in mirror reflections and subtitles no one else acknowledges. Choosing to "follow" its prompts leads to a hidden fourth chapter that crashes the game – deliberately, as the debug text reads: "You were not meant to love the specter."

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