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One day, while I was spending happy days with my girlfriend Sui, a group of yakuza suddenly appeared in front of us. They told us that Sui had been kept by the yakuza as collateral for a debt, but had run away. We tried to leave with Sui, but after a scuffle, we were both kidnapped. The yakuza then imprisoned us, and with a lewd smile said that if Sui could endure a week of aphrodisiac sex training, they would release us both...