This is a simple story of a girls crush on a boy. What makes it great is the actors and directors magic.
ML- his acting was simply superb. He can portray every emotion on this face and communicate through eyes without saying a word. He made emotional scenes look real and surreal.
FL- she’s well known for her acting skills in the roles she’s done. Whether it’s long ballad or who rules world can display varied emotions on her face. Her high schools girl to college transformation was classy.
Director- has made story heart warming and the transitions are smooth during the times of their childhood to adulthood.

Only thing I missed is both FL and ML were good at showcasing the emotions when they looked at each other. The way it’s said a kiss can tell hundreds of things but theirs was lacklustre one. It lacked passion and was cold when it came in last three episodes. Their chemistry was cool but kisses showed lack of passion.
It’s not the case for ZL if you watch who rules world or love like galaxy.