Half in the shadows, half burned in flames

I havent seen anyone explain it like this. The very last thing Hyunsoo said to Eunyoo, in ep6, is ,,I will bring them back no matter what. We have to meet them again."

Ending is a continuation of his narration! ,,Not everyone could return..." (to her) although he promised to bring them all back to her, madame Cha and the little boy and her brother back with his emotions but it was not possible as the madame died, the little boy was better off living in a community... And yet there was someone who did come back! Thats why Eunhyuk finishes that statement with ,,and yet I wait". Meaning, he was the one who actually did come back, waiting on the rooftop for that reunion, waiting right there being by Eunyoos side. This explanation fits because the others didnt hit 100% for me due to the ,,yet I wait" part - if they were talking about their dead ones it seemed weird Eunhyuk would become sentimental, saying yet I wait - he was not like that even as a mere human, he would not ,,wait" for the dead ones. So it just didnt satisfy me completely so thats why I think maybe my explanation fits it all.

So anyone being bothered by this can maybe join me in this explanation.

Oh and more thing to proove this could be correct - is it was them waiting for her to get back her emotions Eynhyuk would say ,,and yet WE wait". because the question was only - if he himself would come back to her as she asked him to (and Hyunsoo said he will bring him back), and as there never even was a question if Hyunsoo will return to her, therefore, the use of ,I'.