The easiest way to integrate the mature content directly into your library is through Valve's platform. Locate NEKOPARA Vol. 3 - 18+ Adult Only Content on Steam . Purchase and download the DLC directly.
The Nekopara series is famous for its dual releases. Understanding the differences between the versions is crucial for players looking for the definitive experience. Content Differences nekopara vol 3 18 version 2021
For those interested in playing Nekopara Vol. 3 today, including its 18+ content, here are the official and recommended sources: The easiest way to integrate the mature content