Double Climax! The Beautiful Sisters' Donburi Has the Highest Taste - Maria Ono, Yui Kyono

The sexually active older sister (Maria Ono), after being penetrated by her younger sister's (Yui Kyono) boyfriend, is still not satisfied and uses a vibrator on herself. Not wanting to be outdone, the younger sister starts giving oral sex to her older sister's boyfriend when he comes over. Then, when the older sister comes out of the shower and discovers this, she also gives oral sex to her boyfriend, and so they start having a sisterly lovemaking session…