Three years ago, Nozomi married a businessman, but when his company went bankrupt and debt payments fell into arrears, she was taken away by a man named Katsuragi from the pet shop "Mijuu Shoten." Katsuragi immediately recognized Nozomi's potential as a slave dog and promptly sold her to his associate, breeder Sakurai. From that moment on, Nozomi was trained by Sakurai, her body—especially her anus—conditioned until she gradually came under his complete physical and mental control. Now, Sakurai plans to take her to the "Aiken Social Club," a gathering of slave dog enthusiasts, marking a new and darker chapter in her life.