I love this show so much because it really digs deep into how parents forn their children, and even if the parent did a good job, bad things can happen, and even if they did a terrible job, the kids can get support from friends, relitives, and come out good. It was a plot twisting heart wrenching story, with the most awesome ending I have ever seen. Casting was perfect and I love all these actors now. I rewatch this every winter, because it just gives me the feels.

The development of each character is so special. And the Brother sister relationship is so good and realistic.
Sean Ho is really an example of a hero, he's so good.
It's interesting to see his sister is pretty bratty, and hot headed. But she also fights for the truth, and believes in being brave.
The parents are so supportive of each other, and must go through the shock and grief about their son's accident. And realize what they didn't know about their children. And they have to believe in them and fight for the truth.
This drama is also an interesting view of what you might do when you see a crime committed, what is the first thing you think to do? And what would you do to avoid being blamed? How guilty would you feel? And how far can you take a lie?
Beautiful world is really about not how the world is beautiful, but weaving through the ugly to get to your loved ones, who make it a beautiful world.