Tsukasa, the older sister, is played with by her younger brother as a mouth-pussy slave. She drools obscenely during a deep throat blowjob that almost penetrates her throat and cheeks, and her twisted brother swallows it while making slurping noises. He then spreads her pussy and performs cunnilingus on her, making her climax with a sloppy, ahegao face. Even though she knows it's wrong, her brother's relentless torture makes her cum over and over again.