I found the drama confusing. Initially, it seemed like the female protagonist was sent to resolve the conflict between the Devil and humans on her own, but unexpectedly, a male protagonist joined her. However, this male character had a dual role - one as her lover and the other as her master, complicating the storyline. Despite his love for her (her master), his role was ultimately sacrificed, leaving me puzzled. I anticipated that both characters would merge into one, but the conclusion revealed they were distinct individuals. Overall, I'm dissatisfied with the ending and strongly disagree with it.
I shipped the second leads especially the female lead.