My name is Akari Niimura, a 27-year-old office lady. I got addicted to gambling from my teens, and it got pretty bad, but I managed to get better... But recently, a man I met at work invited me to play mahjong for the first time in a while, and I got hooked because I was winning so easily... This beautiful office lady, who is covered in debt, first has her rectum cleansed with an enema, then her anus is violated thoroughly, and after being tied up, she is forced to give oral sex and serve the penis, becoming a miserable human toilet slave to the evil beasts...