MTL - My Senpai Knows Magic - Chapter 203 Holy Magister Codex

I fell into a game world out of nowhere with an instant kill skill.
And then somehow, I became a bigshot.

"Lu Lijun! what're you doing?"

Liu Zilang had a well-kept secret — he was a prodigy in competitive FPS eSports. His specialty? CSGO. He even entered the finals in the prestigious world tournament.

Alas, his team fell short due to Liu Zilang’s inexperience. Shattered by the fact, Liu Zilang vanished from the eSports scene. That was until his friends got him to play a new game known as PUBG.

Liu Zilang’s life turned around and he began to make his comeback. Follow Liu Zilang as he encounters difficult situations, all while learning to open up as a person, but more importantly as a brother.

- Description from Novelupdates

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