Plot
In 2045, songs are banned. Instead of humans playing instruments and creating music, a music app titled ＂MiucS＂ is in charge of these activities. High school student Seria goes out with her friends one day, but she happens to hear someone singing, which is supposed to be prohibited. What she finds is a lone ghost, a ＂Great Ghost＂ who has appeared from outside this world. (source: Crunchyroll)