SSIS-952 Konan Sayoi is a kind sister who turns out to be a prostitute

Konan Sayoi plays the older sister who takes in her younger brother for a week during his company training in Tokyo. After twelve years apart, they quickly become intimate, and she discovers his erection when he runs to the bathroom. She turns out to be a soap prostitute, and they spend all hours together with titty blowjobs and slimy play.