One day, Spank desperately fights to protect fans who are being attacked by red dogs on the beach. Miyagawa, a police officer who was watching it, comes to scout Spank. I'm going to train as a police dog. Aiko opposes, but Spank is a dream again! It soars as much as it. Spank was taken to Tokyo. I can't come back for a while. Aiko who is lonely. I can't help worrying. On the other hand, Spank only fails in training, and this is also thinking of Aiko. Disappointing Miyagawa. Aiko, who is worried there, comes to see how she is doing. The trainer tries to get rid of Aiko because it's in the right place. Suddenly, Spank bites the trainer like a different person. When Miyagawa found out that he was a dog that could fight only for his loved ones, he gave up on Spank. Spank was able to come back thanks to clumsy and stupid. Everyone seemed to be very lonely while there was no spank...