Im Si-wan, Seol In-ah to co-star in tvN romance series 'No Mercy'

▲ This poster of tvN’s upcoming drama "No Mercy," costarring actors Im Si-wan and Seol In-ah, is provided by Tiger Studio. (PHOTO NOT FOR SALE) (Yonhap)

SEOUL, Dec. 30 (Yonhap) -- Actors Im Si-wan and Seol In-ah have been cast as co-leads in tvN’s upcoming drama "My Guilty Human," the broadcaster said Tuesday.

The series is based on the popular KakaoPage web novel "How Could You Not Know She’s a Woman" and tells the story of an arrogant third-generation conglomerate heir and a detective who becomes his secretary.

Im will play Yoon Yi-joon, the next in line to inherit Taekang Group, while Seol stars as Kang Jae-hee, a former special forces officer turned detective who disguises herself as his secretary.

The drama will depict the pair’s growing relationship as Kang, disguised as a man, clashes with Yoon while working alongside him.

The series is scheduled to premiere next year.

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