I like the intense atmosphere of Congratulations.

The guitar and drums come in strongly right from the start, instantly setting the mood the moment you hear it. It is a breakup song, but the music itself is very powerful and upbeat, making the contrast interesting. The vocals also express emotions intensely, making the mood of the lyrics feel even more vivid. If you play it loudly when you feel stifled or stressed, it feels like it helps to relieve some of that tension. If you like DAY6's early band sound, you will especially enjoy this track. I recommend it because it is exciting yet clearly conveys the emotions of a breakup.