4 stars for me.
The drama is slow and steady, a beautiful narration of real-life events. If you love reading, this drama will tickle your imagination and creativity. The slowness will either frustrate you or make you think that our life is dependent on our decisions, big or small. Love is selfish and unpredictable, one moment you are over the moon the next you are utterly frustrated and lonely. This drama will teach us that love will never grow if we don't argue about the smallest thing, and make us adjust with one another.
The thing that resonates with me the most is the friendship of the characters, that is being a friend through and through, fighting if you must but what is important is being there for each other whatever happens.
The leads really may be frustrating as they grow up really really slow, but love has no timeline if you analyze and think more deeply, thus the 4 stars.
I love dramas that make me analyze and think.