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MBC has a new variety show called 'Puberty in Their 40s.' The premise of the show is simple, two best friends in their 40's go on a spontaneous trip together to remind themselves of their younger days. On the January 28 episode, comedian Jung Jun Ha went on a trip to the countryside with Kwon Sang Woo.

At one of the stops during the trip, they visited a sauna, and in the sauna, Kwon Sang Woo showed off his abs which delighted his fans.

Check out the segment below.