Girls' Last Tour - Vol. 4 Ch. 24 - Wavelength

[MangaDex]

 

[Tzuyuchu]

O_O What are those huge ass robots? War machines?

 

[Alraisen]

Don't gimme that "what is a song" shit. Of course they would know about that, it's probably human's oldest artistic invention.

 

[LeoTomson]

"invention"
In other words, something that is discovered, learned and/or created.
Which means there was a time when it did not exist, and it could be lost.
Congratulations, you've played yourself.

 

[PsychoTheRabbit]

da hell... in the anime she said she scraped her eyes lol Now makes more sense