Here is a simple guide for you to download and install R18+ patch. enjoy the new patch.
How to Download
Download the patch here: https://drive.google.com/drive/folders/1ZbgG41JkhYygbwuxM86C10kGyGUFsNEy?usp=sharing
You have it.
Nice, next step
How to Install (Step-by-step Tutorial)
1-Open the file “SummerPatch v1.00”
2-Open “SummerPatch_manual.exe”
3-Click here
4-Search the game directory :
Disk\SteamLibrary\steamapps\common\Summer~Life in the Countryside~\Summer~Life in the Countryside~
5-Click “OK”
6-The uptade apply automatically
7- Wait and when is finish close
8-DONE
Thanks to Ḩع Ꭿ℣₳ η ℱ Ꭿ ȴ for his great 18+ patch. all credit to his effort. you can also check out the original guide from Steam Community. enjoy the game.