On September 6, her agency Celltrion Entertainment stated, "Oh Yeon Seo is currently reading the scenario. Her casting hasn't been confirmed, but the negotiations look optimistic."
'Hwayuki', written by the famous Hong sisters, is a romantic fantasy that revolves around people who fight evil spirits. If cast, Oh Yeon Seo will be playing the character Jin Sun Mi, whose life is transformed after she meets Sun Wukong. Lee Seung Gi is currently in talks to star as Sun Wukong soon after his military discharge this October.
You can expect the premiere in December, so stay tuned!