Brace yourself ladies, Seo In Guk is loaded with guns of steel for 'Men's Health's steamy September issue!
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Although fans previously got a peek at his muscular back side, Seo In Guk has now turned around to show off his drool-worthy abs. With his roles as a security guard in 'The Sun of My Master' and a swimmer in 'No Breathing', the actor has definitely worked hard to beef up his muscles.
Do you like the new and improved Seo In Guk?
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