Rio grew up with her mother, and her mother alone had to work hard to raise her, giving everything the best for her. Therefore, when her mother introduced her to Uncle Shinzo, seeing that she was happy with that man, Rio also felt happy for her. Only, she still felt that this man was a little strange. And just as Rio had thought, when his mother was not at home, he raped her! Because she didn't want her mother to be sad when she found out that the man she loved raped her own daughter, Rio tried to endure it. The stepfather also realized, taking advantage of this, he forced her to obey, let him fuck her anytime he wanted...