This is my first modern Korean drama and I'm impressed because I didn't expect to like it...
The story is not new, but quite nicely written, although there were moments in the plot when I didn't know what it was about... in general, it's a pity that the drama is not available on YouTube with automatic translation into various languages, because I was struggling with the English one and maybe that's why some of the threads were unclear to me...
It's a kind of romance with funny, but also dramatic twists.... love turned into a deep feeling by accident, but it was interrupted by a 3-year separation... I didn't understand it at all... ok, Lee Gun's illness was mentioned, but he she was behaving strangely... because when he finally started to develop feelings for Kim Mi Young and first adored her, and then suddenly broke up in such a hopeless way that he contributed to a car accident and the loss of a child... then the action moves 3 years ago forward and they meet again... she is already a famous cartoonist, and he continues his work and is the president of a large company... when he finds out that she is back, he chases after her again and does everything to get her attention, and again he does something so senseless that he suddenly hurts her so painfully and disgusts her... I don't understand it at all... if he knew that he couldn't be with her due to her illness, why does he encourage her and incite mutual feelings... very strange... however, the ending is happy, which I'm glad about, because I don't like tragic endings, especially when the main leads go through so many difficulties and traumatic experiences.

I really liked the main actors, there was a nice chemistry between them - great.... one of the writers accused that the bangs didn't suit ML, but I personally liked it because it fit Lee Gun's character and behavior at the beginning of the episodes and this laughter was also ok at the beginning, but then when they got back together, he actually used this laughter too much, although it was explained at the end why - because of his father, who gave him a message to smile often in life even in difficult situations moments...
Nice role played by Jan Na Ra... she was able to show emotions nicely... I also loved Lee Gun's grandmother, who had a distance to all matters.
OST - it was quite nice, especially the song Good Bye My Love

I recommend