I think the dev could solve this issue and the issue of Luna seemingly sticking it out in this world for no good reason by doing 2 things.
1. Ditch the "old" game idea and make it a VR headset compatible game with the latest and greatest in VR technology that makes the user feel like they're actually in the game world.
2. Give Luna and Anon a legitimate reason to play this game to completion. They seem to be rather poor since Anon can't even afford a bed. Why not have a mystery man from the game company knock on the door to promote the game. Have him give away 1 free headset which will go to Luna, while Anon has to just use his PC. Have him mention that the winner of the game, or say the PVP champion which Luna is already interested in wins a million dollars, or whatever he thinks they might enjoy.
This solves both the issue of Luna somehow getting corrupted playing the game and gives them both a a reason to play through to its completion even if there are perverts in the game. It could even potentially lead to a NTR ending where Luna decides to go with the winner of the game and ditches Anon.