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This is a world where elves and humans coexist, and people with the talent to control beasts are called beast masters. Su Buping traveled through time and got his first beast: the foam frog. Then, he awakened the traveling frog system. So, go travel, Foam Frog, and let me see what goodies you can bring back. Skill machines that can teach elves skills, candies that improve elves' attributes, elemental stones that can upgrade elves... Oops, there are so many evolution stones that I can barely keep them at home. I don't have any special skills in controlling animals, I just let him go on trips often, and when he comes back he is invincible. --The most powerful man in the world, Su Buping's quotations.

"No one knows Azkaban better than me. I hope students from Slytherin, Ravenclaw and even Gryffindor will pay attention. If you insult my reputation and are sent to Azkaban in the future, I think the Dementors over there who are familiar with me will not mind coming to trouble you every day." Browder, the new Professor of Muggle Studies at Hogwarts who has been in Azkaban for ten years, said this to the newly admitted students.