Here are some screencaps for Melon Mobile, in case anyone was finding difficult to navigate.
(Read http://justjyh.com/xe/free/227271 to register in Melon)
1. Go to Melon, swipe to last page to enter
2. Front page: go to SEARCH on bottom right
3. Enter "Jung Yong Hwa"
4. You get the songs, click on "One Fine Day" when it pops out
5. If you haven't registered, go ahead and register your device
6. DOWNLOAD the song by Clicking "Download" after you touch the song.
STREAM by clicking "STREAM" after you touch the song.
