If Yvonne tried to explain about the System, would it allow that? I think Evie likes Yvonne enough she'd believe her, especially since she's been so nice when she's supposed to be 'bullying' her. If she could explain I think they might be able to figure something out... but then again, we don't know exactly how powerful the System is. It was able to completely upend Yvonne's life just cause she wouldn't kill Evie, so who's to say it wouldn't take matters into it's own hands?
I think for those two to be happy they need to find a way to beat the System, since that's the only thing holding Yvonne back from letting herself admit that she likes Evie
Damn can't believe the system isn't allowing Yvonne to like herself fr fr (it's Elsa lmao)
But yeah, in order for them to actually progress they'd need to stop whatever the system is, big threat (even tho I believed it was the best wingman :(. ), they'd need to find the roots and stop it, seeing as this world is magic and all it isn't hard to believe that the cause is some kind of magic.
But if the system is some kind of invincible eternal system, then I think the best way to truly get rid of it is trying to fulfill the story, aka Elsa getting a love interest. Its pretty clear that Yvonne is probably a love interest, maybe in a sequel of the game she just never knew. So them getting together would get rid of the system.
But again we have no idea just how the system can be defeated, and all of this is just dependent on hope that it would work.
If it's like some magic curse or beast then I can imagine Elsa and Yvonne teaming up and making the elemental fusion or something that Yvonne mentioned many chapters ago to defeat it.