Daisuke felt a sense of dissatisfaction with his girlfriend Yuu, who was monotonous in sex and lacked charm. When Yuu was suddenly told of their breakup, she decided to become the kind of woman who could rekindle his love. This was the beginning of everything. Yuu, who resisted, was confined like an animal in a cage, and discipline began with candy and whip. Sensual development by a trainer and multiple plays resembling rape. Nevertheless, Yuu continued to accept the training for the sake of her lover...