It's always the jealous antis who are more motivated to give negative review. Doona trended, globally rated in top 5 or above, #1 in many countries including SK and in top #10 in many countries for over a month for a reason. Many will agree, Doona is strangely addictive, mainly because of the intense chemistry between Doona and Won Jun and the not obvious happily ever after ending. Yang Sejong is amazing as ever...showing why he was dubbed Monster Rookie his debut year and winning best actor awards. He really convinces as an innocent boy who has pure love for Doona yet manages to not completely lose himself, which makes him even more attractive to the viewers and Doona (versus being a completely lovesick doormat). Suzy is beautiful and part of the fascination is whether she as Doona really loves Won Jun...one can't help but doubt til the end. Not sure if that's good or not good enough acting on Suzy's part? She's definitely Doona tho.