All the Villains in the Book Were Once My Cubs [Interstellar]

Please pre-order the next book "Playing the role of cannon fodder and becoming a heartthrob after overturning" Many years ago, Cui Yun had just traveled to the interstellar era and created a cram school to take in all kinds of problem teenagers. Cui Yun taught him carefully for several years. One day, Cui Yun suddenly discovered that he had actually traveled through time in a book. In this book, "The Great Interstellar Era", these troubled teenagers happened to be the main villains in it. When they become adults, they compete with each other in viciousness. Cui Yun thought about his previous education methods-spanking, pinching cheeks, banging on the head... Then, Cui Yun ran away. [Because it was not set properly when I wrote it, there will be some logic bugs that cannot be modified. Readers who are concerned should proceed with caution. Intention: