Kayou.'s 'Heartache' came out on December 19, 2018. With this song being around four minutes long, at 3:31, 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. Because this song is the only song in Heartache and no other songs are present in the album, we classify this track as a single. Heartache is not that popular right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

Heartache テンポ

We consider the tempo marking of Heartache by Kayou. to be Adagio (slowly with great expression) because the track has a tempo of 75 テンポ, a half-time of 38テンポ, and a double-time of 150 テンポ. Based on that, the speed of the song's tempo is slow. The time signature for this track is 4/4.

Heartache 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.