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One viewers claimed that it was unrealistic for a doctor to wear nail art on the job, writing, "Even if this is just a drama and people usually have certain reserves about that, I still wonder if it's okay for a doctor, and a surgeon at that, to have such extravagant nail art. It's evidence that [her nail art] is keeping me from being absorbed in the drama." 

SBS has since issued an apology for the matter, saying, "We talked about her nails with Park Shin Hye before the drama began. But because they didn't seem too flashy, we weren't able to consider their effects on the drama. We accept the criticism that it took away from the realistic aspect, and will take greater care until the end."