Hachiko uses his love and loyalty to make him known to people all over the world. He takes his owner to the bus station every day and goes home with him at night. Even after the death of his master for 10 years, Hachiko still persisted in going to the bus station every day to wait for his master to go out to fight. In the end, he slept under the tree at the bus station. In order to commemorate Hachiko's loyalty, people built a statue where Hachiko was waiting for his master.

However, there is another puppy doing the same thing as Hachiko. Its owner has left, but it still perseveres in waiting for its owner to return.

This dog is called "Bobby". Before he met the professor, he was a stray dog ​​that had been wandering on the street for a long time. Later, he was taken in by the professor and followed the professor into the school. He stayed here for three years.

Poppy's three-year campus life was the best time for Bobby. He could teach with the professor every morning, have lunch with the professor in the afternoon, and go for a walk with the professor at night. He was happy as he had never felt before in his life.

Furthermore, Poppy is loved by the students in the school because of the presence of the professor. If the professor has to go out due to emergency one day, the students will actively feed Poppy. Therefore, Poppy regards the school as his home and the professor as his master in this life.

Unfortunately, the professor passed away at home due to a sudden myocardial infarction, and Bobby did not see the professor for the last time, and he was not on campus at that time. Until it came home and found that the professor's room had been closed, it didn't know that the professor had left it.

It wasn’t until the day the professor was buried that Poppy had the chance to see the professor’s back again. Poppy saw the professor lying flat in the coffin and refused to leave for a long time. It was full of smiles and hoped that the professor would keep calling him again, but this call was something he would never hear again in his life.

Bobby just lay in front of the professor's body. No matter how many people were around him, he didn't care. He just wanted to stay with the professor for a while. Because the professor in his heart had not left, he had to guard the professor all the time. This scene was really heartbreaking.

In the end, the professor's students took Poppy out. They really didn't want Poppy to live in pain and were ready to find a new house for him.

But Poppy doesn't want to forget the professor just like this. It still wants to wait at the door of the professor's residence and the classroom where he often teaches every day. Even if the students try to coax it away with food, it will go back home after eating the food.

The three years that Bobby spent with the professor are memories that he will never forget in his life. It was the first time that he experienced the warmth of home and the care of his owner from the professor. It was the first time that he no longer had to live in such fear, and it was also the first time that he had a name. Therefore, Bobby will never forget the professor. Even if the professor has left long ago, the professor in his heart is still "alive", just like a loyal puppy.