On what day did it start? Is the boring and peaceful life of a trainee starting to become noisy? The gray surroundings are given a new color for the first time? Mark Duan lowered his head and sighed helplessly, but couldn't restrain the corners of his mouth from rising. . . It seemed, probably, that it started when a certain little +puppy came to him. . . Yes, that's it, this damn little chatterbox, Duan Yin's little talker.