one day, while i was spending happy days with my girlfriend natsu, a group of yakuza suddenly appeared before us. they said that natsu had been kept by the yakuza as collateral for a debt and had run away. when we tried to leave the scene with natsu, we were all kidnapped after a scuffle. then the yakuza imprisoned us and said with a lewd smile that if natsu could endure a week of forced sex training, they would release both of us…