Ryoko Asamiya lived happily with her husband in an old house they owned, but one day a man named Okamoto appeared, demanding the property deed as collateral for her brother Shuichi's unpaid debt. Unable to consult her husband, Ryoko agreed to submit to the men's demands in exchange for returning the deed. As a result, the men took control of her, targeting not her used vagina but her untouched, unexplored anal passage, turning her body into their commodity. Through relentless assault, humiliation, and pain, her body is gradually dominated and broken.