Shuri works as a secretary to the president. One day, her younger brother Shinji makes a move on a yakuza woman, and both he and Shuri are kidnapped. To make amends for what her brother did, Shuri is overpowered by the yakuza members. She endures repeated sexual acts and falls into being a sex slave. Watching his sister in this state, Shinji becomes aroused by his own flesh-and-blood sister and decides to join the underworld himself and participate in the acts… Betrayed even by her brother, Shuri loses hope for living…
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