DLsite JPN: https://www.dlsite.com/maniax/work/=/product_id/RJ325255.html
Two boys find an extremely realistic female doll, take it to their secret hideout,
and have some fun with its body.
Unpack the game then replace the data file
This just got released today- http://www.dlsite.com/maniax/work/=/product_id/RJ136490.html
From the demo it seems it's a fairly standard hrpg but what sets it above many others is very decent art.