Details

Minami, the older sister, is burdened with a large amount of debt. Ruka, the younger sister, is made to cosign. One day, men in black suits come to Ruka's house and make her watch a video letter. The video shows Minami being brutally raped in front of her husband. Minami is said to be being held captive by an underground organization to pay off the debt. Ruka is then taken by the men and reunites with Minami in a fishy underground place, where a stage filled with madness, with applause, cheers, and the groans of men echoing throughout the room...