康士坦的變化球's '流出海口的河' came out on August 22, 2023. Since 流出海口的河 is still less than 10 minute long, it is still considered a pretty long duration song compared to the average song length. This song does not appear to be explicit due to the lack of the "E" tag. There is only one song in 眠月線, so we believe that "流出海口的河" is a single. 流出海口的河 is unknown right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

流出海口的河 テンポ

The tempo marking of 流出海口的河 by 康士坦的變化球 is Andante (at a walking pace), since this song has a tempo of 80 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.

流出海口的河 キー

G Major is the music key of this track. This also means that this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.