One thing to know about me is that I only write reviews is when I have something to say. There are a lot of things to say about this drama. Honestly this drama was an experience, or rather an adventure for me. I kept thinking about my teenage years during my watch, and actually made me sad about all the experiences I've missed out on, It's a drama that will make you think about a lot of things. I don't want to write a lot, because I am very late to the party, and it is a wide known show, so I think a lot of things have already been said. But on to the review. I absolutely loved this drama. It quickly became one of my all time favourites. I feel like this drama, should serve as a blueprint for romcom dramas, and especially coming of age ones. It was the most beautiful and realistic portrayal I've ever seen about growing up. I think it was the best choice to put the FL at the center of the drama. The storytelling worked together with the FL, we seen her going from an immature kid with a big dream, to a full fledged adult, as she progressed, and learned from her mistakes, as she learned from the situations that she faced. I absolutely loved the story, and the way the drama was telling it. The drama was full of colorful characters with their own problems and deep personalities. The group were the main stars of the show. I also really loved our ML, as he had to struggle with being an adult, while clearly still feeling young and sort of like a kid inside, and even though he said that he does not really relate with the group, I think that's far from the truth. Seeing historical events happening through his eyes, and the events of 9/11 was a powerful experience. I think the controversial ending, wasn't really controversial at all. I think it was rather unfortunate, but it didn't ruin the whole story for me. I kind of liked it. It felt realistic, it stayed true to the nature of this drama. Love doesn't always conquer all, and I think that's okay. Finally, I also loved the OST, it was one of the best OST's I've ever heard, I also absolutely loved the intros aswell, they were very fitting. Overall I really enjoyed my time with 2521, and I would recommend it to everyone to check it out, especially for people who are newcomers to kdrama as a whole.