As soon as her husband goes on a business trip, her son-in-law suddenly changes and locks her mother-in-law, Kana, in a cage to discipline her. - Kana is frightened by her son's polite tone but gives off an intimidating feeling, and cannot resist him... He obeys the shameful order of public masturbation and is f** to r** her and cums incestuously! - During the three days her husband was away, Kana was completely trained as a female dog, and when a collar was put on her, she became obedient and began to beg for ``Please insert me...''!