The quartet main actors: Lee Jong-hyuk, Jang Dong-gun, Kim So-roo, Kim Min-jong
While watching this drama, I always wondering whether my boy friends' life will be like the quartet main actors in their forties. It's quite hilarious to be imagine ^^
If you're a fan of Running Man or Family Outing, you must be familiar with Kim So-roo "The Game Devil". Kim Min-jong also has participated on Running Man as a guest on Christmas 2010 with Super Junior's Si-won.
Jonghyun's involvement as one of supporting actor and Yonghwa cameo appearance (eps 13) are the biggest trigger for me to watch this drama at first, but it turned out that I'm still enjoying the story without their faces on some episodes :))
Jonghyun as Colin Black. It has been said that one of the quartet is his father!
Yonghwa as himself (cameo for eps 13)
This drama has great soundtracks too. So it's good your eyes, ears, and tasty food for your soul! ;)