I hope I'm wrong, but I think seonwoo came back to his world. While leaving the seonwoo of that world and the ML would/not though about if he is the seonwoo he was in love with. And if he does think that seonwoo just have a amnesia though to what happened and still treat the seonwoo of that world the same( seonwoo of that world were going to get confused) and that would be sad for the TRUE seonwoo ╥﹏╥
I hope I'm wrong, but I think seonwoo came back to his world. While leaving the seonwoo of that world and the ML would/not though about if he is the seonwoo he was in love with. And if he does think that seonwoo just have a amnesia though to what happened and still treat the seonwoo of that world the same( seonwoo of that world were going to get confused) and that would be sad for the TRUE seonwoo ╥﹏╥