Download and install the modified APK provided in the official release thread of Maid Lain's Patreon or reputable mod forums.

When prompted by the system, select . macOS Installation Download and extract the base game and mod files.

If you have a pre-existing installation of the game, open your device's File Manager and copy your existing save files from Android/data/com.kompasproductions.summertimesaga to a backup folder.

Download the base folder and the Lain's Mod Pack file archive. Extract the base game using tools like WinRAR or 7-Zip. Open the mod archive and extract the folder labeled "game" .