Sonar Pocket made "拝啓、元恋人" available on February 10, 2021. With this song being about 5 minutes long, at 4:58, "拝啓、元恋人" by Sonar Pocket is fairly a long song compared to the average song length. This song does not have an "Explicit" tag, making it safe for all ages. There is only one song in 80億分の1 〜to you〜, so we believe that "拝啓、元恋人" is a single. In terms of popularity, 拝啓、元恋人 is currently not that popular. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

拝啓、元恋人 テンポ

The tempo marking of 拝啓、元恋人 by Sonar Pocket is Andante (at a walking pace), since this song has a tempo of 105 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.

拝啓、元恋人 キー

This song has a musical key of C Major. This also means that this song has a camelot key of 8B. So, the perfect camelot match for 8B would be either 8B or 9A. While, 9B can give you a low energy boost. For moderate energy boost, you would use 5B and a high energy boost can either be 10B or 3B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 8A or 7B will give you a low energy drop, 11B would be a moderate one, and 6B or 1B would be a high energy drop. Lastly, 5A allows you to change the mood.