Covers used in this video:
Kikyuune Aiko:https://www.youtube.com/watch?v=X9VtzvVw-Sw
SF-A2 Miki:https://www.youtube.com/watch?v=A7rUJCTCIwo
Kasane Teto:https://www.youtube.com/watch?v=j5mxXsPOs1Q&t=79s
Hatsune Miku:https://www.youtube.com/watch?v=7zwCIz-Ohn4
...
https://www.youtube.com/watch?v=VITbIhGNqbQ