Drunk and horny, Wolf Tanaka can't resist playing a prank on his passed-out sister, Ren Usui. He slips some lube onto her pussy, and her body responds instantly. She wakes up, disoriented but driven by primal instinct, and mounts her brother. Their bodies grind together, Ren's tits bouncing as she rides Wolf's cock. The siblings lose themselves in their taboo passion, the tight confines of the bathroom amplifying their moans. Wolf's dick pounds into Ren, her pussy clenching around him as they both chase their high, ignoring the wrongness of their actions.