>>5982851
>>5982884
Alright, I dove a little further and have to make a correction. The audio file is NOT from the bonus content of Senran Kagura Burst but from Senran Kagura: Skirting Shadows.
Shadows was the original Japan-only release. Senran Kagura Burst is the Director's Cut version of the same game that also saw a release in the US and EU.
Both Skirting Shadows and Burst got a bonus CD set bundled with the limited edition of the game but the audio files on them are different. None of that bonus content ever made its way to the US and EU versions.

The audio in this new webm is from the audio drama CD for Senran Kagura Burst. It sounds like they recorded something similar to the original bonus Content for Skirting Shadows so it might be a remake of that story. I don't speak Japanese so I have no idea whether it's the same idea or they just happened to include another chapter with a similar concept.