My point is that there is no way they can be together. She is an immortal machine, a perfect intelligence; pretty, but dreadful at the same time. Btw I was excited when I realized that she is an AI, not just a doll to fuck, and that means the game has a solid part in cyberpunk genre. On the other hand he is just a guy, one of the billions. Though being not stupid and quite initiative, he is overwhelmed and humbled by life like many other people. For her being in relationship with a human is a game of being human herself; the more she soaking in human society or absorbing human experience, the more her only game becomes a game of survival. I doubt that a supreme being like her would be satisfied with a robot girlfriend or robot slut experience. This guy showed her something interesting, yes, but there is so much in the world beside that. Come on, he lives in slums, he eats nothing but some shit-ready-to-eat from a local store. He has no appearance, no physiq, no opportunities, nothing to show of. The only thing he can do for her is to provide some understanding of a human nature, hoping that she will use her knowledge not for evil deeds. I think that a Good endgame could be like "well, those days together were wonderful. Let us see what else life can offer".
She is someone's property. I don't think she could be a Chinese sleeping agent, more like a local corporate / government (which is a same thing in the US in nearest future) asset. Why would anyone make a sexbot with a combat capabilities? Clearly she was made for an infiltration and/or assassination work, and that those who lost her are eager to bring her back. I'd really like if main characters will manage to screw over her proprietors somehow, and then Jun will dissolve into global network, acting here and there from the shadows with a purpose to bring a long lasting days of peace and prosperity to the humanity... And all of this became possible thanks to the passion of a common man.
Well, I made it all up, but I hope you get the idea. In my opinion, this game isn't here to satisfy dreams of humbled men. To love and to be loved (or at least it has to look like that); to be with a willing girl who asks almost nothing in return. Well, the game can provide some experience for such longing and dreams, but it isn't only about that.
What important is that one has to be a good man, even if it sounds cheesy and vague. That is why we have the bigdaddyhurt character - he's a complete opposite to the MC. He is a man who would never understand how anyone can treat a sexbot like a human being. First time I saw him talking about 14 hours of work while sniffing coke I thought - yeah, that's a top manager character for you. I could go on and on all day about how many simple ideas this game has. That one should not dwell in dreams of how things should be. That one should not wait when someone else will solve all problems. And so on. Once again, in my opinion it isn't about how a weak man found a perfect girl and then they lived happily together until he died. Though anybody can play it as almost any other adult game if they like - a sex and doll dressing simulator with a few scraps of plot and jokes.