After some searching, I can definitely say it is an eroge from a company called "ruf". The game is called Dokusen or 独占.
I've link the getchu link for your reference. https://www.getchu.com/soft.phtml?id=5885&gc=gc
A given mission, mechanical assault, manufactured devotion.
Red eyes, an upside-down form. Even the twisted shape was made to be that way.
No matter how cruel the slaughter, worse than a demon's,
or how gentle the kindness, greater than an angel's,
a machine has neither will nor madness—only code, and a few bugs.
So why, then, does it feel so unbearably sad?