It's sooo good, I fell for them after the second episode. I love how they try to protect each other, especially from the abusive father. And it's nice to see Do Hoe smile when he is with Yu Young, as his life was so hard and he had to endure a lot.
I wish that the drama had stuck to the story in their teenage years, as the 10-year later jump is not that interesting and it doesn't have the same charm. It's a real shame, as the first two episodes were perfect.
In the end, I understand why Do Hoe behaved terribly, and we got a lively last episode, but it does not compensate for the middle part.
Overall, it's a nice story that could have been beautiful.