Based on existing content in Jikage Rising v1.19c and later versions, you might consider developing:
Ren’Py scripts are typically found as compiled .rpyc files. You will need a (like UnRpyc) to turn them back into editable .rpy text files. JikageRising-v1.19c-apk.apk
After adding your code or assets, repackage the files into a new APK. Based on existing content in Jikage Rising v1
Once decompiled, you can add new dialogue, story arcs, or "lust system" mechanics by editing the Python-like syntax in a text editor. : you can add new dialogue
You can introduce new "outfits" or "scenes" by placing new .png or .jpg files into the game/images folder and defining them in your script.