I agree that the song refers to something overwhelming, but I think Hoon is too vague in this song to conclude that he is specifically referring to one thing or another. I would assume heroine is the leitmotif of this song. The last lines of the song may be a discussion between him and an heroine incarnate. Or perhaps he is explaining his contribution to a relationship between him and a loved one.
I agree that the song refers to something overwhelming, but I think Hoon is too vague in this song to conclude that he is specifically referring to one thing or another. I would assume heroine is the leitmotif of this song. The last lines of the song may be a discussion between him and an heroine incarnate. Or perhaps he is explaining his contribution to a relationship between him and a loved one.