One day, Rina, a new teacher, visited the students in her homeroom class. But as soon as the students welcomed Rina, they forced her to drink tea laced with a sleeping drug and tied her up. During the act, the father of a half-gray student also intervened and thoroughly raped her. That night, when the loan sharks who had lent money to the father arrived, he proposed to use Rina's body as collateral for the debt and let them do whatever they wanted. Eventually, Rina became a depraved woman who accepted everything, from vaginal ejaculation to facial ejaculation...
