One day, Yukari went out to sea with her husband, but after drinking at a bar, she lost consciousness. When she woke up, she had no idea how long she'd been asleep—only to find a strange man in black standing before her. Her husband, burdened with massive debt, had sold her to a criminal organization as payment. Yukari was taken to an underground warehouse at the docks, where she was placed into a clandestine gambling ring known as "Toko Club." There, she met Naho and Mari, women forced to live as sexual betting pieces. They told her, "Hell begins tomorrow." The story follows Yukari's life as it takes a dark, irreversible turn.