It sounds like you're looking for a summary or guide (a "paper") for the game TS Mamono Musume Chiho
The screen shattered. A sound like glass breaking mixed with a digital sigh echoed from his speakers. The pixels of Chiho’s form began to unspool. Her tail didn't vanish; it expanded, turning into a kaleidoscope of color, filling the screen with a nebula of data. She wasn't becoming human. She wasn't becoming a monster. She was becoming Source. ts mamono musume chiho rj01315765 upd
In the crowded monster girl genre (harpies, slimes, lamia, etc.), Chiho breaks the mold. She is classified as a "Yosei-Kai" (Mist Spirit) with physical traits of a Moth (moth girl). This is rare because most monster girls lean toward mammalian or reptilian features. It sounds like you're looking for a summary
Lamia Route: In this branch, Kyota can fail to defeat a clone of the Lamia Queen, leading to a journey to regain his form, or successfully investigate "Lamia Skin," which may result in him discovering his physical body has permanently become a Lamia. Production Values Her tail didn't vanish; it expanded, turning into
[Chiho]: The "Architect" stopped writing months ago. The code is running itself now. You know that feeling, don't you? Wearing a skin that doesn't fit?
The Appeal of Fantasy and Supernatural Genres
The protagonist undergoes a gender transformation (the "TS" element) and must navigate a world populated by various monster girls ( mamono musume Key Mechanic: