kalsy made "Boulevard" available on October 30, 2022. Since Boulevard is still less than 10 minute long, it is still considered a pretty long duration song compared to the average song length. This song does not appear to be explicit due to the lack of the "E" tag. Because this song is the only song in Boulevard and no other songs are present in the album, we classify this track as a single. In terms of popularity, Boulevard is currently not that popular. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

Boulevard テンポ

The tempo marking of Boulevard by kalsy is Andante (at a walking pace), since this song has a tempo of 102 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

Boulevard キー

This song is in the music key of D♭ Major. This also means that this song has a camelot key of 3B. So, the perfect camelot match for 3B would be either 3B or 4A. While, 4B can give you a low energy boost. For moderate energy boost, you would use 12B and a high energy boost can either be 5B or 10B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 3A or 2B will give you a low energy drop, 6B would be a moderate one, and 1B or 8B would be a high energy drop. Lastly, 12A allows you to change the mood.