Park Bo Young is one of my favourite actresses, her acting is out of this world, it is impossible to not smile when she is smiling or not to cry when she is crying, she was perfect for this role.
Important thing is that this drama is not probably for everyone, it explains many hard topics as depression so for some people it can be perfect healing drama while for others too hard to watch, but in my opinion it is totally worth watching.
Spoiler or not - I was team Jang Dong Yoon.