There's a lot of effort that has to go into making a story complete within four hours, and there's always that risk of it being rushed, or not deep enough. `Fanletter, please` does a really good job of handling this, giving us enough time to ease into the characters and their relationship together. I also loved how their past connected to their future, but was not the entire basis of their relationship. I do think four episodes is not enough time to handle everything: (trigger warnings)namely, grief, death, s*icide, bullying, panic attacks; and to that I do feel like it felt rushed, or underdeveloped, and that we could've gotten a portrayal of these in equal importance even if they weren't taken to these extremes. But I also do understand the rationale that was there, and saw the attempt to handle it well.I've been waiting to see Yoon Park in a soft romance since Age of Youth (one smile and I was gone), and I feel like this drama fell right into the overlap of everything I wanted to see from him. Sooyoung continues to impress as always: her personality on screen and off screen bring me equal amounts of joy <3 I love seeing her on screen. Also big props to the actress who played Yoona, she did such a fantastic job at such a young age.Overall: So worth a watch and so worth the time. I'd actually be willing to see them on screen for several more episodes if the drama gods get my drift.Really glad I watched this one.