Story (9.5/10):
The story is sensitive, simple and touching. You will be immersed in the first few episodes and will want to know what happened in this terrible accident that left such a deep trauma in the main characters.
The story of this drama is very real, and you learn several life lessons with it.

Acting/Cast (10/10):
I never watched anything with the main actors before but WOW, they surprised me. The lead actress rocked  so Jun Ho as well. As much as the story was touching and sensitive, and the scenes from the main couple were cute and romantic, we wouldn't have been so immersed in the story and in the chemistry of the couple, if wasn't for the acting of the main actors. They rocked.
The secondary cast was very good too. In fact the cast was very well chosen and everyone did a good job.

Music (9.0/10):
I loved the soundtrack, they had many songs in English (which is rare). The songs were beautiful and made the scenes even more touching.

Rewatch Value: (8.5/10):
The story is very good and the actors acted very well so it's worth rewatch.

Overall: (9.5/10):
I absolutely loved this drama . I loved the characters ( Gang Doo was my favourite ), I suffered with them and cheered for their happiness. It's a very realistic drama and everyone can identify themselves with a lot of scenes. It's worth watching, I'm sure you'll like it. :)