The acting was beautiful and realistic, the soundtrack was just ethereal, and the cinematography was superb. I really appreciated the confident lead. It's an anomaly in a lot of Kdrama to have even one strong, self-assured female lead. Incredibly in this drama, there were 3! This is also one of those rare dramas where the OST fits absolutely perfectly with the drama. One of my top favorite pieces is "Millenial Love", a song that shows up for the first time when the male lead lets the female lead listen to a composition he wrote for a video game (this is not a spoiler, no worries!). The music comes alive with masterful camerawork. The original piece was composed by Lim Ha Young, who composed (if I am not mistaken) all of the instrumental pieces on the OST (Original Sound Track). The whole OST album is gold.