There are two primary ways to access the 18+ adult content for the Steam version: purchasing the official DLC directly on Steam or using an external patch from the publisher. 1. Official Steam DLC The easiest method is to purchase the NEKOPARA Vol. 1 - 18+ Adult Only Content directly on the Steam store.
: This typically involves downloading an executable that finds your Steam folder and extracts the necessary files. Nekopara Vol. 1 Steam 18 Patch
Before the official Steam DLC, users had to buy the game on Denpasoft or download a patch file manually. There are two primary ways to access the