This was obviously one of the best or even the best drama I've ever watched. this OST from ailee is so heartbreaking.its one of my favourite songs btw . So the story itself was at some points hard to follow ,but you'll get it. the acting was gorgeous I'm in love with the main actress how she can express anxiety and sadness at once (this is so amazing compared to which kind of person she played in strong woman Do Bong Soon). if you like sad dramas to cry out your eyes this is the best to watch I'd cry just replaying the scenes in my head. if you want to watch it then please do it on grey cold days in the winter or autumn- you'll completely get into it and yes it's 10 out of 10 and I don't want to spoiler so I'm ending this review here (P.S. it's totally worth watching it so don't hesitate and dooo it. you won't regret it, I promise)