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According to UEE's agency Pledis Entertainment on December 16, UEE and Choi Woo Sik will star as the leads. Although it was previously reported that UEE will play Kang Ho Gu's (Choi Woo Sik) sister, it turns out she'll be playing the female lead Do Do Hee, who is a national swimming athlete.

Do Do Hee possesses pretty looks and a unique personality, and she looks for true love between her first love Kang Chul and Kang Ho Gu. Kang Ho Gu is a webtoon artist who would do anything for his first love Do Do Hee. The plot centers around a mysterious child who Kang Ho Gu ends up taking care of.

The drama will crank in towards the end of this month and will premiere following 'Sensible Love' on February 9 at 11 PM KST.