Pentagon's Hong Seok has confirmed his appearance as "Lee Jin-sung," an idol trainee with a warm appearance, in the Kakao TV original "Shadow Beauty", which will be unveiled in the second half of this year. Lee Jin-sung is the only person who takes care of Koo Ae-jin (played by Shim Dal-gi), who is not good with friends because he is an idol trainee, but is hurt by her appearance. It is a character who gives Gu Ae-jin a ray of light in school life like jungle, and reveals an unadorned reversal charm only in front of Gu Ae-jin.

"The Shadow Beauty" (director Bang Soo-in, planning Kakao Entertainment, production engine film and movie company Dam-dam) depicts the life of a girl who is bullied at school, a girl who lives as a colorful SNS star "Genie" at home, and Koo Ae-jin's thrilling after-school double life. It was based on the same title webtoon by Aheum, which was published in Kakao Page, and was loved by many fans by collecting 700,000 subscribers and recording a rating of 9.1 points.