I had high expectations with the plot that a man who is depressed finally gets a second chance at life through the eraser of his bad memories. Even though the first episode wasn't great, I persevered but the series kept getting worse and had no business dragging on for as long as it did.

At first I liked the female lead's character and it made sense why she was so formal with the male lead. It made sense that she wanted to keep things professional as a doctor patient relationship. But as the show went on, her behaviour made no sense. She lacked compassion. But it was not just her that frustrated me. Too many characters acted senselessly. The ML's mother who is a helicopter parent, his brother who comes across as a sociopath, the young doctor who also acted unethically in so many ways! And if that isn't enough, the ML feels like a useless character whose job is only to be miserable and obsessed with 1 thing.

I would suggest you watch the first 4 episodes and then the last 2 and it's all you'll need to understand the entire plot. Nothing else really matters. It is just dragging the story and turning it into a nonsensical one. There is barely any romance in the drama as well.

Perhaps the only highlight of this series is the OST. In particular, I enjoyed the song - grey.