Depending on where the file was sourced, it generally includes the following official expansions:
Find your game's installation directory (often in SteamLibrary\steamapps\common\Mirror ). Install the DLC: Move the extracted folders into the game's root directory. File: Mirror__DLCs.7z ...
Contains 48 high-resolution CGs that were not included in the base game (4 extra for each girl). Depending on where the file was sourced, it
In some versions, you must complete the base game's initial character stories before the DLC characters become playable. How to Use 7-Zip to Compress Files and Extract Files File: Mirror__DLCs.7z ...
Adds 4 new characters with advanced animations, additional CGs, and new background music.
Right-click the .7z file and select "Extract Here" or "Extract to Mirror__DLCs/".