Actor Seo Kang-joon showcased his outstanding physique.
On the afternoon of 27th, Seo posted a photo.
The revealed photo shows Seo Kang-joon without a shirt. In the photo, Seo Kang-joon boasts solid muscles that are not inferior to Ma Dong-seok. His well-defined back muscles and broad shoulders caught the attention of viewers.
Fans who saw the photo showed various reactions, saying, 'Really cool,' 'Workout motivation pic,' 'Wow, so cool. I thought it was Ma Dong-seok.'
Meanwhile, Seo Kang-joon is currently appearing in "Undercover High School." The comedic action drama depicts the tumultuous activities of a National Intelligence Service agent, Jung Hae-seong, who goes undercover disguised as a high school student, airing every Friday and Saturday at 9:50 p.m.
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