>>884938I analyze her voice and this is my conclusion.
This is not her "real" voice leaked or anything, its just her whisper while she get closer to the mic.
So she either lean forward to check something or in half-stand half-sit position.
Now, if its something in front of her, she would not need to say "have to go" with a slight tone of panic.
Of course, a cute girl like Gura would never fart on stream so THAT possibility is discarded.
If its a cramp, then it should take longer to recover and we should hear some moan.
May be she get some sharp pain and gone when she react to it.
I am a SEAnig so take this analysis with a grain of salt.