This video shows Sosha sitting on the toilet, with her panties still on, peeing through them, then masturbating once they are all good and wet.
Sosha filmed this video herself in her own bathroom. In the video she records herself sitting on the toilet, wearing red panties. Without pulling her underwear down she pees. We can see and here her stream as she goes through her panties.
After she is done peeing her underwear has a visible wet stain, which she briefly shows off before she starts to touch herself. Not taking her wet panties off, she continues to film herself as she masturbates in them. Once she climaxes she says a brief goodbye and stops recording.