First of all, this series main attraction, for me personally, is the character development itself which we could learn something from it.
Like what being said within the series "Losers maybe weak and lame. But losers awlays tried their best" I really like this quotes and it really depicted within the series itself.
For couples and newly wed couples, this series is also good which teaches you guys, especially girls, who wants something but their pride preceeds them. If you know your partner is not good at guessing your signals, then you should just say it straight, rather than stressing yourself.
You guys really need to watch this series I'd say. The family theme is really strong and the moral values are also very good, at least for me.