A week is spent with only one person to trust and protect her: a glamorous girlfriend imprisoned by the yakuza and driven to drug use, promiscuity, and depravity. (Tsukino Eisui DASS-375)

One day, while enjoying a happy life with his girlfriend Cui, a gang of thugs suddenly appeared. They said Cui had been imprisoned by the gang because of debts, but had managed to escape. Although they took her away from the scene, they were eventually kidnapped again. Then, the gang imprisoned them, saying that if Cui could endure a week of aphrodisiac sexual training, they would be released. He said with a lewd smile…