"小公主" by 晨曦光廊 was released on December 12, 2016. 小公主 appears to be safe for all ages as it is not explicit. There is only one song in 遺失的人間童語(上), so we believe that "小公主" is a single. 小公主 is not that popular 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 小公主 by 晨曦光廊 is Adagio (slowly with great expression), since this song has a tempo of 67 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 5/4.
A Major is the music key of this track. This also means that this song has a camelot key of 11B. So, the perfect camelot match for 11B would be either 11B or 12A. While, 12B can give you a low energy boost. For moderate energy boost, you would use 8B and a high energy boost can either be 1B or 6B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 11A or 10B will give you a low energy drop, 2B would be a moderate one, and 9B or 4B would be a high energy drop. Lastly, 8A allows you to change the mood.