Arz made "18+" available on April 16, 2021. 18+ is 2 minutes and 8 seconds long and may contain bad words that may be unsuitable for children. The track order of this song in Arz's "Love Letters" album is number 1 out of 6. In terms of popularity, 18+ is currently average in popularity. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

18+ テンポ

We consider the tempo marking of 18+ by Arz to be Andante (at a walking pace) because the track has a tempo of 90 テンポ, a half-time of 45テンポ, and a double-time of 180 テンポ. Based on that, the speed of the song's tempo is slow. Activities such as, yoga or pilates, can go well with this song. The time signature for this track is 4/4.

18+ キー

F Minor is the music key of this track. Because this track belongs in the F Minor key, the camelot key is 4A. So, the perfect camelot match for 4A would be either 4A or 3B. While, a low energy boost can consist of either 4B or 5A. For moderate energy boost, you would use 1A and a high energy boost can either be 6A or 11A. However, if you are looking for a low energy drop, finding a song with a camelot key of 3A would be a great choice. Where 7A would give you a moderate drop, and 2A or 9A would be a high energy drop. Lastly, 7B allows you to change the mood.