A little sister uses her brother's dick to release stress and sweat. The little sister is an athletic girl with an insatiable libido and plenty of stamina, plus a well-trained physique. She straddles her brother, sits on his face, and is so perverted she tries to get his taste and smell. She deep-throats him and asks him to do it for her, and gets covered in saliva. Their sexual desires never run out, and in the end they have intense, inseminating sex while choking each other. This is the story of a sadistic little sister with a twisted sexual fetish and a masochistic big brother.