I found a sub but they didn't finish it yet, so I am waiting. Here is the link if you can help them finish it please do (I think you should sign in first): http://www.darksmurfsub.com/forum/index.php?/topic/7516-secretly-greatly-2013/?hl=+secretly++greatly
Apparently I can't take their sub and hard sub it, so you have to download it from there, but wait until they finish the sub.
The raw movie (torrent): http://torrentgun.net/bbs/board.php?bo_table=torrent_movie&wr_id=1616
Click on: Secretly.Greatly.2013.KOREA.720p.HDRip.H264-HanStar.torrent
http://mydramalist.com/korean-drama/6699/dating-agency
http://mydramalist.com/actor/1333/jong-hyuk-lee/page-2
http://mydramalist.com/actor/2550/choi-soo-young
http://mydramalist.com/actor/429/park-yoochun
http://mydramalist.com/actor/431/joong-ki-song/page-2
http://mydramalist.com/korean-drama/2986/youre-beautiful
http://mydramalist.com/actor/210/park-shin-hye
http://mydramalist.com/actor/212/jung-yong-hwa
http://mydramalist.com/korean-drama/2278/hana-kimi-korean-version
http://mydramalist.com/actor/213/.-uee
http://mydramalist.com/actor/1068/yoon-se-ah
Apparently I can't take their sub and hard sub it, so you have to download it from there, but wait until they finish the sub.
The raw movie (torrent): http://torrentgun.net/bbs/board.php?bo_table=torrent_movie&wr_id=1616
Click on: Secretly.Greatly.2013.KOREA.720p.HDRip.H264-HanStar.torrent