A close, low-angle cropped view shows an adult person's lower torso and thighs in a private room, with details partly obscured by framing and clothing. Likely next moment: the person moves the camera or adjusts their posture.
Shizukuno @shizukuno_

非常努力地忍尿到极限，装进了1.4升的瓶子里。差点要溢出来有点慌，不过能装下真好…。大概尿了1.2～1.3升吧