: After installing the DLC and completing character routes, additional story content becomes accessible via the " After " option on the main title menu. How to Install (Steam Version)
The free DLC primarily refers to the 18+ Adult Content Patch (often called the "Unrated DLC"), which restores explicit scenes omitted from the standard Steam release. DLC Overview & Content
Café Stella and the Reaper's Butterflies – Walkthrough & Guide
: Use a tool like 7-Zip to extract the files, which usually include an adult.xp3 file and an executable.