MTL - Seventy Koi: The Unlucky Boss Hugged Me and Cried - Chapter 50

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

There’s a legendary Bishoujo Game that has become popular among Japanese gentlemen.

The wrong way to act as a villain no.1: Get rid of the protagonist while he still hasn’t become powerful.

The wrong way to act as a villain no.2: Take the limelight from the protagonist at the key moment.

The wrong way to act as a villain no.3: Make the protagonist fall in love with you, thus making him incapable of completing the final step – eliminating the major villain.

Han Changsheng, Head of the Demonic Cult, is the major villain who’s employed all three incorrect methods.

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As the leader of the first Demonic Cult in the underground world of martial arts and cultivation, Tianning Cult, Han Changsheng carried on the long-standing tradition of an unstable mind and a refusal to seek any treatment.

Originally, his life should have passed by quickly and simply, but one day he kicked a descended Immortal Lord off a cliff. In order to make up for this mistake, he must aid the Immortal Lord in ascending back to his position… but why does this mistake keep growing? Hey, lao zi doesn’t need you as a younger brother, you should look for An Yuan! Don’t chase after lao zi, you’re destined to be An Yuan’s wife! Don’t worship lao zi as a martial arts lord, lao zi is the genuine leader of the Demonic Cult! Hey, Hey lao zi is obviously the major villain! What the hell are you doing?!

- 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