xiexie made "13" available on July 7, 2021. The duration of 13 is about 3 minutes long, at 3:24. Based on our data, "13" appears to be safe for all ages and is not considered explicit. This track is about the average length of a typical track. There is only one song in 13 / firefly, so we believe that "13" is a single. The popularity of 13 is currently not that popular right now. Based on the vibe, this track doesn't seem to be that danceable, however its valence properties can make this some somewhat danceable.
The tempo marking of 13 by xiexie is Presto (very, very fast), since this song has a tempo of 179 テンポ. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 1/4.
The music key of this track is E Major. This also means that this song has a camelot key of 12B. So, the perfect camelot match for 12B would be either 12B or 1A. While, 1B can give you a low energy boost. For moderate energy boost, you would use 9B and a high energy boost can either be 2B or 7B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 12A or 11B will give you a low energy drop, 3B would be a moderate one, and 10B or 5B would be a high energy drop. Lastly, 9A allows you to change the mood.