Yea was thinking like that too! Aside from the ost and wish thing, in the ending there was that "timetravel" sound…
That is exactly what I think too. I am almost certain the fact that it made that noise and it stayed in her world /universe means it became reality. Plus her reaction is a pretty good sign that is probably him, because it only ever did that if it involved him.
Episode 10 tore my heart out, I don't think I have cried so much from a death in my real life that much. They really made it reach my heart in such a short span of 1 episode, I must say Seo Hyun Jin is an incredible actress.
male lead makes an obscure confession in episode 30. They become official couple in episode 42.
While this true, I also think that they both accepted each others feelings in episode 31. They never said it out loud until later, but every interaction between says they are truly together at that point.
After how good the first two episodes were, I have high expectations of this show now. I just have a feeling there will be tears shed, whether it be happy, sad, or both.