This is one drama that is really great among the few time travelers – dramas. First, I'll start with the story. The genre itself tells us the story, time travel, youth, friendship, first love, musical. But what separates this drama? What makes it special, different from the rest? First, the whole story is divided into sections (retrospect) through which we get to know the characters and their lives from different angles, their problems, and through them we arrive at the main plot. Something that underpins this drama is that we get to know the story through the main characters and their little prologues that are really emotional. Throughout the drama there were various emotions and feelings that were a major part of the story, and the characters conveyed all the emotions perfectly to me and the rest of the viewers. And in fact this story gives us a much deeper meaning, which is that life is perfect with our imperfections, and sometimes we have to learn to live without thinking about the past, because the future is in front of us. These are some of the best impressions this story has left on me, and certainly on anyone who has seen this great play. As far as the characters, as I mentioned to you, they did a great job. They conveyed every emotion so realistically, and in my opinion, the main characters did the best job, especially the ones who couldn't speak, because they fascinatingly introduced us to their personalities and conveyed each emotion in sign language. I liked that they actually handled the main characters' backstories very well, getting to know them better and getting us into the whole drama. I want to start with Ha Yi Chan, the one ML. His character was really dynamic and difficult, but still so interesting and funny to watch. His character was represented from two sides. One is from the perspective of the mature and experienced Yi Chan with his difficult life situation with his family, and the other is from the perspective of the first image we had of his character who is energetic, lively, cheerful, so carried away in his youth. We see the huge contrast between the two characters of him, but we actually see that they are very similar. They are content with what they have, they value their things as if they were most precious to them, and they live as if it were their last. Although his difficult story was told through both personalities, he managed to stay who he was and did not give up on his dreams. His character was the most interesting and also the hardest to watch, but both actors did a great job. And then there's Chong-ah. As I mentioned earlier, I'm fascinated by the grief of her character. We have the same case as Yi Chan. We see her character from two perspectives. But I would talk more on her character in her youth, because that's when we get to the heart of her story. I actually liked that at first she was portrayed as a shadowed person, but over time we realize and discover how combative, strong, and filled with grief and pain she is. Through love, she confronts herself and her problems and learns how to fight in life, and we see the same with Yi Chan. The other FL was also fantastic. As for her character, there was the most contrast between the two personalities of her character. We have a cold, insensitive girl versus a cheerful, playful, free-spirited girl, but both have experienced a lot of trauma and difficult situations. We see her way of wrestling with herself and with life. I liked that her character was included in the main plot because it all made sense in the end. And finally, we have the other ML. His character, like the others, is seen from two perspectives, but in a different way from the other characters. We've seen the whole story throughout his life, and that's why I think his role was really the most important. I liked that in the other characters the lives were presented as a flashback, but in his character it wasn't. We see his perseverance and great desire to improve the family, and to do something that will make everyone happy. I think that even though his character is seemingly portrayed as the most mature and self-aware, the main message of the drama is conveyed through his character, which is that no matter how hard we try sometimes we can't change some things and situations in life, but we can accept those things and use them as an opportunity for something new. Something better. All the characters are interconnected, and although they all have different problems, coming from different backgrounds, they find happiness in the darkness, and turn insecurities and imperfections into opportunities for struggle, for success, for life and happiness. Some may not want the ending because the second main couple in the drama didn't have the ending they imagined. But I think it's great that for them we're back in retrospect, but now with a new and better life for them as well as for all the other characters. It's this ending that suits the drama the most and makes it even better, and all the characters get what they really deserve. As for the OST, there really aren't any words here. Because it's a musical itself, the characters express all the feelings through songs, it's actually great that music is one of the main genres in this drama because it's the one that brings the characters together even though maybe not everyone can hear it, they can feel it. A lot of funny and interesting moments were told through it, but also the traumatic and bad things that the characters went through. Although the drama was filled with countless happenings and things, there was a flashback to time travel and multiple plots, it is still perfectly good and excellent, so I reckon everyone would have liked it. As you can see, this drama is one of the few that deserves a 10 for everything. Except for the value of re-watching. Yes, the drama is perfect, but one viewing is enough to grasp the point of the drama and the message it carries. I personally would watch it again, if only because of the wonderful songs that were part of the drama and the fantastic acting of the characters. All in all, my final rating is 9.5, for this masterpiece, which will definitely remain etched in the hearts of many viewers. Finally, I want to share my favorite message from this play, which has really taught me a lot. In fact, a person is like a fortress, which is built of a myriad of virtues, perfections, and beautiful traits, but there are also flaws, imperfections, scars, and whiteness that make that fortress even stronger and stronger. It is up to us whether in life we will fight and tear that fortress behind us or give up and tear down our personality (^o^)