Well, this is gonna be hard for me to be objective so I think I'm just gonna straight up subjective :)
One of the best things of this drama is the feelings and thoughts that it lefts after you finish watching. You will be absolutely overwhelmed with sadness, uncertainty, frustration but at the sametime hopefulness, bittersweetness, nostagia and content. Your heart will sunked when you're coming to accept that the couple could not find a way back together in the future. In the vast multiverse, surely there will be countless one where there's a happy ending. However, I respect the the writer's decision to explore the bittersweet of life and the human nature in accepting and living with the consequences of their own action. The outcome of their relationship is logical considering their own choices. It's disheartening that Ji Yin's profession is the one that caused Hee Do so much trauma in her childhood, although it's one of the trait that attracted her to him. It's fortunate that they come together in a time that they most needed each other, being each other's motivation and drive for all future success. However, it's unfortunate their relationship began when they're both too young, too under prepared for all the hardship that came their way. In this sense, the writer have done a fantastic job cultivating a tight-knit story portraiting love and life.
The casting for Na Hee Do is perfect. Her performance is off-the-chart when representing an student athlete who is reckless, driven, stubborn and full of positivity.
I would like to thank the cast and crew for all the hard work that they put into the drama, amidst post-pandemic. Their effort and love to this drama is clearly shown in each scene that I watched.