Best drama best couple best acting

The main character's chemistry is amazing, Ji Changwook and Kim Ji Won are a perfect match as a couple. The storyline is very touching, even though it is slow but can express the overall feelings experienced by the players. the cinematography is really fresh to see.
The story is related to everyday life. even though it's made like a documentary and different from other dramas ..
the storyline is difficult to guess even though the story is light. I think there is a lot of learning in this drama, not only telling stories about love but friendship as well