Boku no Lyric no Boyomi made "遺書" available on December 12, 2018. With this song being around four minutes long, at 3:55, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. There is only one song in 没落, so we believe that "遺書" is a single. Based on our statistics, 遺書's popularity is below average in popularity right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

遺書 テンポ

The tempo marking of 遺書 by Boku no Lyric no Boyomi is Allegro (fast, quick, and bright), since this song has a tempo of 130 テンポ. With that information, we can conclude that the song has a fast tempo. This song can go great with walking. The time signature for this track is 4/4.

遺書 キー

F♯ Minor is the music key of this track. This also means that this song has a camelot key of 11A. So, the perfect camelot match for 11A would be either 11A or 10B. While, a low energy boost can consist of either 11B or 12A. For moderate energy boost, you would use 8A and a high energy boost can either be 1A or 6A. However, if you are looking for a low energy drop, finding a song with a camelot key of 10A would be a great choice. Where 2A would give you a moderate drop, and 9A or 4A would be a high energy drop. Lastly, 2B allows you to change the mood.