This 1 Litre of Tears sad, I don't know if they are trying to encourage or discourage being foster parents.  It is one hour long so there is no time for lag or dragging. I liked how they didn't sugar coat anything though.  You definitely felt the joy, frustration, happiness and despair with the family as they bonded, fell apart and re-knit.  

This is from 2003 so the production value isn't super high but the acting was well done and immersed you well into the story.  I would recommend this story for some one looking for a good slice of life drama and only had a small amount of time to spend watching something.