I loved this series very much... are there any series that match the level of this series?

Well, it's not "similar", but it somehow matches the level of quality and production... being rather serious dramas and very well made.

Mother    

Mr. Sunshine    

My Dearest    + My Dearest Part 2    

The Glory    + The Glory Part 2    

Healer   

Flower of Evil    

Stranger 

 awesome:

I find similar vibes with movie, “girl with dragon tattoo”  ( rooney Mara)

Oh wow. Really?? In what way? That's a pretty interesting comparison :O

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Leaving aside the main theme, 

1. Age factor similarity

2. FL’s feelings for ML

3. ML sort of playing mentor 

4. ML’s unexpressed feelings for FL

( my friend Nath , would really like to know your views on my this comparison)

That's really interesting!! I need to ponder about this further :)

I love the drama and I love the movie. Pity that they never made a sequel :(

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And not to mention the excellence in all the departments ( acting, direction, storyline)

True in every aspect!