Rainbow Bridge Watchman

Briefly about Rainbow Bridge Watchman manga:

When Han Cheol, a famous veterinarian who knows only money and success, can hear the animals one day, a man appears in front of him. This sudden meeting makes him realize that his life is going to change. The man gives him a stone book and tells him to read it. When Han Cheol listens to the animals, he realizes that all the creatures would like to meet someone who can hear them like he does. He goes out of his house telling the story to anyone who cares about animals and receives help from people whose hearts hurt for lonely animals. When he hears the voice of an elephant hidden in a place