Nekopoishounengaotonaninattanatsu01 -

The cats’ ears, tuned to frequencies beyond human range, recorded the event in their collective memory. The resulting “chapter” is catalogued as – the first ever documented transformation of ordinary sound into a feline‑crafted saga.”

That appears to be a , likely from an image board, gallery, or archiving site (e.g., Danbooru, Gelbooru, Pixiv, or a similar booru-style platform). nekopoishounengaotonaninattanatsu01