Homeless Mistress, Vol. 3: Sadistic Prince Ties Her Up to Keep Her

Nana, who is brought up in a rich family, is now homeless. One day, she ends up surrounded by delinquent boys. The guy who helpes her from them is the son of the Narumiya Family, who had a bad relationship with Nana's family. He is such a sadistic guy who ties Nana up, and fondles the sensitive parts of her body. She is humiliated by getting stimulated by her arch enemy. What is going to happen to Nana?