Fantasy Life =P
It's a light RPG you can pick up and play whenever you want, be it for 5 minutes or 12 hours. It has many content and many gameplay hours ahead (I'm close to 40 hours and didn't see half of the content yet). It's a bit like Rune Factory without the farming and relationship systems (you can't get married in Fantasy Life, and you can't own a farm, just houses).
You should take a look, we are already a couple playing it on the forum =P