The core of the file is likely a "character card." In Koikatsu, these are specialized PNG files that contain all the metadata required to load a specific 3D model, including its face shape, body proportions, and voice settings.
Files with this naming structure are typically hosted on community forums or specialized character-sharing sites like IllusionCards or Pixiv . Always ensure you are downloading from reputable community sources to avoid malware bundled in compressed archives. KK_(RU)_YT_Girl_015-Lesbian.rar
Detailed "pieces" usually include custom clothing sets. Given the "YT" (YouTube) or specific "RU" (Russian creator) tags, it may be a recreation of a specific internet personality or a high-effort original character. The core of the file is likely a "character card
To view or use this "piece" properly, you would generally need: The base game. Detailed "pieces" usually include custom clothing sets
"Detailed" often implies the use of custom skin overlays, makeup, or specialized eye textures that require specific plugins like OverlayMods or KKS_CharaStudio .
Based on the naming convention typically used in the game's modding and character-sharing communities (like the Koikatsu Sunshine/Party Discord or IllusionSoft subreddits), Likely Contents