"ふたりきり" by 松田彬人 was released on April 27, 2016. With ふたりきり being less than two minutes long, at 1:45, we are fairly confident that this song is not explicit and is safe for all ages. Based on the duration of this song, this song duration is much smaller than the average song duration. There is only one song in 『劇場版 響け!ユーフォニアム~北宇治高校吹奏楽部へようこそ~』オリジナルサウンドトラック「Reflection of youthful music」, so we believe that "ふたりきり" is a single. ふたりきり 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 ふたりきり by 松田彬人 is Grave (very slow), since this song has a tempo of 45 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.
E Minor is the music key of this track. Because this track belongs in the E Minor key, the camelot key is 9A. So, the perfect camelot match for 9A would be either 9A or 8B. While, a low energy boost can consist of either 9B or 10A. For moderate energy boost, you would use 6A and a high energy boost can either be 11A or 4A. However, if you are looking for a low energy drop, finding a song with a camelot key of 8A would be a great choice. Where 12A would give you a moderate drop, and 7A or 2A would be a high energy drop. Lastly, 12B allows you to change the mood.