(often abbreviated as "KK CharaStudio") is a standalone scene layout and rendering engine. Unlike the main game, which focuses on narratives and social links, CharaStudio gives you complete control. You can pose characters, adjust lighting, add props, create complex animations, and render high-quality still images.

WTF Is Chara Studio!? - Koikatu Chara Studio Beginner Tutorial

Some games and related tools are available on various gaming platforms or digital distribution services like Steam, GOG, or others. However, availability can vary based on region and the specific content.