I Became the Villain's Trainer - Chapter 68

Just like how everyone adored heroes in their childhood, a certain young man adored those powers hidden in shadows. After hiding his strength and living the mediocre life of a mob character by day while undergoing frenzied training by night, he finally reincarnates into a different world and gains ultimate power. The young man who is only playing at being a power in the shadows, his misunderstanding subordinates, and a giant organization in the shadows that gets trampled…. This is the story of a young boy who had adored powers in shadows possibly eventually reigning over the world of shadows in another world.

Traveling to a different world, a bizarre, mysterious and vast world unfolds in front of Zhao Ji. He wants to run hard in this vast world and live a free and easy life.

- Description from novelbuddy

However, he did not know that he was not raising just a harmless pet, but a biological weapon secretly made by the government… a real monster.

As a former librarian, Rand felt that he had been living an ordinary life, the one that he had reclaimed unconsciously every single day.

Recently, he has been a little upset because the pet fish he accidently brought home to raised seems to have undergo some strange changes

Well, it turned into a merman.

- Description from Novelupdates

Is he a genius in the spotlight, or is he a madman behind the scenes of the Second Avenue?—-After getting the final relief from his past sufferings, Chu Jiashu was given a second chance when he found himself in the body of an infant from an aristocratic family of Hall. Now, nothing is going to stop him from achieving his long-cherished dream of acting. Enter Renly Hall, a Hollywood miracle of 21st century.