Brother's wife prostitution training

While her husband was on a business trip, her brother-in-law, Makoto, suddenly came to visit Rei. Rei becomes suspicious of her brother-in-law's unusual behavior. Then Makoto opened his mouth, looking embarrassed. "money…". Makoto had borrowed a large sum of 5 million yen from a high-interest lender. Rei heads to the vendor to talk first. Then Rei ends up working in Makoto's place at a bar run by a man. At a prostitution bar that sells obscene acts... And Rei, unable to escape, is played with by the customer. I didn't even know that it was all set up...