They are all meat-eating male protagonists. I don't accept it and won't be ambiguous with you. If there are many women, you can also say that you are biased. You can moisten it and see for yourself.
The author of the first book wrote some mindless plots in the previous book that were controversial, and some people thought it was spiritual, so this book seems to have reflected on it and avoided many mindless plots.
The author of the second book can only talk about the issues mentioned in the first book, but avoids them all in the second book. He is an author who can listen to what the reader is saying.
The third book was pretty good, and made me suspect that The Greatest Uncle had returned to the literary world.
The fourth book lost to the original porn world and heroines, changed these into mixed martial arts, and took off directly, but it is estimated that it will also be harmonized.
Not much else to say.