A J-style sister, worried about her shut-in brother, goes to check on him in his room only to find him building a "wall-pussy" inspired by an erotic manga! Seeing her usually lethargic brother working so hard for the first time in ages, she decides to help him build it. However, the sight of his sister's big ass bound to the wall causes the brother's sexual desire to explode, and he immediately fucks her immobile pussy! Unable to resist the pleasure of the raw onahole, the brother creampies her, and the sister unintentionally squirts in ecstasy. This is the complete story of an incestuous encounter that broke the bloodline barrier.
