You tap the voice buttons on playing BGM !

“Keyboard operation method”
BGM : keys 1 to 5
The voice from the upper left is linked to the button by the key.
Q to O, A to L, comma from Z.
The button will be turned on by pressing the space key.

*This app uses
“Query-Chan” of the Pocket Queries Corporation.
“Pronama-Chan” of the Pronama LLC.