IDPC-003 Substitute Body Double: 10 Days of Confinement with an Unstoppable Middle-Aged Yakuza Boss Who Never Gets Tired, Even After Repeated Release — Mio Sakai

A sister goes to apologize to a powerful underworld boss for her beloved younger brother’s trouble, but after he sees her slim, curvy figure, he takes a liking to her and forces her into a kept-woman role, demanding physical service. Days of being overwhelmed by pleasure and constantly demanded for intimacy follow. A 10-day confinement with an endlessly vigorous gangster boss, with no end in sight. He orders her to obey him at once, and she is gradually broken down and made to serve him around the clock. Over the course of 10 days, her dignity as a woman is relentlessly worn away, and she slowly begins to accept her role as his captive companion.