If you want a chibi version of Yoochun (and Song Joong Ki) walking around your screen (yes, litterally walking around it) in their SKK Scandal outfits, you can download them from here
On the second page, there’s also Jaejoong and Junsu versions of it.
Then open the file (after having unzipped it) and click on “click me)
That’s the result:
If you click on the characters and throw them on the side of your screen, they’ll hold on to it…