An office lady is attacked on her way home from work by a masked man and taken to a secret location. Bound with handcuffs and ropes, she is tormented daily with no chance to resist. As this continues, she gradually transforms into a full-fledged female dog who cannot survive without wearing adult toys. Her transformation involves endless suffering and profound physical changes. Ultimately, she evolves completely into a thoroughly dominated being. This process is depicted in meticulous detail.