Fans have KBS to thank for the glorious eye candy in the fourth episode of 'Spy,' which aired today on January 16.

As pretty much fan service, the production crew inserted a shower scene in which Jaejoong boasts his chiseled abs, showing how his character is a perfect man with lots of aegyo and affection towards his beloved mother and girlfriend yet also lots of masculinity in other elements of his life.  

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Allegedly, he filmed a lot of the scenes within a short amount of time, disappointing the ogling staff members.  As a joke, Producer Park Hyun Suk said they should shoot it one more time since it was a present for their viewers, making everybody on set laugh.  

The production crew stated, "As the drama progresses, Sun Woo will fall into more concerns and conflict, so that the story will become even more fun.  In order to perfectly take on the character that is Sun Woo, Jaejoong always has the script in hand and is doing his best."

Check out the clip below and try not to swoon!  

Tip: little star