Worth a Billion: Modern-Day Courtesan

Yoshiwara, the former man's paradise, is back in modern times!
Asuka, a beautiful young woman, is put up for sale to repay the debt of her parents. She had had no idea what Yoshiwara was till she encountered a scene where a prostitute was selling her body to a man. Terrified! Asuka tries to escape but gets caught by a male customer.