There's a part of me that wants to say yes but knowing Yuri she wouldn't. I personally think that Yuri wouldn't want Ganghwa to go thru the hell of losing her again and by getting back together there she's opening a 50-50 possibility of that happening again.
I honestly kept imagining and typing the possible outcome I thought of, but at some point I erased it all because there was something wrong with it. I'm now 100% convinced that it is impossible to have a happy ending with this show.
Let's just say Yuri did choose to be selfish and lived, that would mean Seowoo will see ghosts all her life and be a shaman which will drive Yuri insane and she would feel guilty throughout her remaining life. Minjeong will leave Ganghwa, Ganghwa will try to win Yuri back but her guilt won't let her give in. Also, let's say Seowoo won't be able to see ghosts, I don't think Yuri would want Ganghwa to go thru the hell of losing her again (getting back together opens a 50-50 possibility that she will die first and leave Ganghwa again).
Personally, while watching and waiting for the episodes of this drama, there were a lot of thoughts running thru my head. A part of me was hoping and praying that it ends happily, because Yuri and the people around her did not deserve to go thru that hell. It's hard to lose people you love. But to lose them twice? My gosh, I think that's just unfair and unbearable. But when the last few episodes came, I knew my happy ending won't come true but I'm glad it didn't because that would just ruin the drama. One of the charms of this drama that I loved is that it stayed true to itself and did not gave in to what the viewers wanted and that made it 1000% more beautiful. Well for me at least.
I didn't mean to make it this long lol sorry. But one thing I really really really wished to see was more of Yuri and Jang Pil Seung's interaction. I low-key ship them (JPS as a second lead of course) lol.