TKT-004 Yukino Kozue, Ayane Yuuki: Kitankurabu 42 – Ugameku, Natsuko no Imouto

The younger sister secretly watches as her sister is being scolded in a shameful pose. A dark desire begins to stir within her body. The sister is tightly bound by ropes… A female college student visits the couple's home and witnesses the couple's secret play. Tempted, the sister gets drawn in and joins the wild training with her sister. The husband dominates the younger sister in front of his wife, while the wife is punished harshly with a vibrator, driven into madness. The depravity continues…