Kanariya wa Kago no Naka

Student Endo Sakimi who has been betrayed by her previous boyfriend, she finds herself in incredible amounts of debt because of money that owes by her boyfriend. She turns desperate, and become a prostitute until one day a client hires her, and sold her to a priest with a perverted fantasies. After that, she discovers Fujidou Mana, a mysterious young girl. Sakimi seeks to break the bonds placed on her, and free her and Mana from this hellish world of sexual desires.