"ゆれる心" by 松山祐士 was released on January 9, 2020. With ゆれる心 being less than a minute long, we are pretty confident that this song does not contain any foul language. That being said, this song is pretty short compared to other songs. There is only one song in 『機動戦士ガンダム』オリジナルサウンドトラック1, so we believe that "ゆれる心" is a single. ゆれる心 is unknown right now. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.
The tempo marking of ゆれる心 by 松山祐士 is Andante (at a walking pace), since this song has a tempo of 83 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.
C Major is the music key of this track. 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.