Ryūseigun is made up of three parts. It is played with a 17-string koto and five 13-string kotos. Each koto plays a different score.
In the anime version, the actual rendered piece has been written by Migiwa Hashimoto 橋本みぎわ, the sister of the manga author, and played by her as the lead along other professional koto players. The author sister wrote half of the original koto pieces,including Tenkyu 天泣, whereas the other half was written by their mother.
- Kono Oto Tomare! Chapter 4