Hibiki Otsuki, the lascivious sister, can't resist her carnal desires, even with her brother nearby. She slips away to the bathroom, her fingers finding her soaking slit. She sucks and teases her brother's cock, taking it deep in her mouth and throat. Standing doggystyle, she feels him pound into her, her tight pussy clenching around him. He pulls out, and she eagerly takes his cum, swallowing every drop, only to start all over again, her hunger for him insatiable.