I actually watched the Korean Drama before and I loved it. But after reading all the reviews about the movie being better, I decided to give it a try. I even started reading the manga because that is how much I loved the story. This was my first Japanese movie and I really liked it. The acting was spot on. The story followed the manga to the T in the beginning. But the K-drama includes more plot lines, I guess due to time restrictions. The problem was that there was very less music included as per my expectations. The female lead is supposed to be this amazing singer but I didn't really connect to that point here. Also, I didn't find her convincing. On the other hand, the male lead was perfect. The characterization matched the original manga. I hated the casting of Shinya, I feel that he was not what Shinya was supposed to be. It just didn't fit right. Even the CEO is potrayed as this completely evil character, which is not true. He is more grey than black.He has no redeeming scenes in the movie.
But, I liked the overall feel of the movie. I just wish it had a more concrete ending. I would totally rewatch it.