Like I mentioned above, the style is reminiscent of Jonghyun's earlier solo work. It has a very classic 80s/90s vibe to it that is what Jonghyun has been, even in SHINee. It's interesting watching him and listening to him now. I've always loved SHINee and “Crazy” is one of my favorite songs of all time, but it's different listening to this and knowing this will be his last album. It's heartbreaking really.
There is something haunting about this song. I don't know what his situation was, when this was recorded or anything, but the emotion in his voice sounded like he was saying goodbye to his fans. The presence that he sang this song with was almost a farewell. This song was probably far from his last song he recorded but it sounded as if it was his final recording so he gave it his all. All it takes is a piano, a voice, and emotion and you have a recipe for tears and heartbreak. Goodbye Jonghyun. You did well. You can now rest peacefully. Thank you for all you've done.