This show is rather poorly written, only adequately directed and quite badly acted by a bunch of young people mostly casted because of their looks. The female lead is also insipid - maybe it's the part or the director, because I've seen IU in other shows and she was good. Quite honestly, the show's only redeeming quality is its male lead, who really manages to mesmerize the audience to the point that some of them even graded the show with 10/10. Otherwise, a show full of plot holes where the colourless female lead only pays attention to the male lead in the last episodes after spending almost the whole show pining over his self righteous brother would have never been classified as "epic romance". So, congratulations to Mr. Lee JunKi, I guess.
Review of Moon Lovers: Scarlet Heart Ryeo
