The Villains Need to Save the World? - Volume 1 Chapter 23: Family

[Mc takes consent from Woman not their husband][Mc doesn't want to NTR every guy. He only makes their wife cheat for sex.][Making friend's mom fall......is one of his big dreams.]“I like married women and there are so many noble women out there...”A horny Otaku from Earth gets transmigrated as an old Viscount.His lifespan is depleting too quickly due to an injury.Fortunately, there is a Ying Yang technique which can increase his lifespan.“This man has been single for his whole life and never touched a woman? WTF!!” Otaku is shocked from the Viscount's dry life.“I do have the maids, right?”[MC likes married women][Netori, Cheating, Blackmail]

Shen Ying is a task performer for the tragedy system. Her mission is to transmigrate into the role of the female lead in...Shen Ying is a task performer for the tragedy system. Her mission is to transmigrate into the role of the female lead in tragic romance novels, enduring one heart-wrenching love story after another.Unlike most task performers who resist such assignments, Shen Ying absolutely adores her job. The tasks are easy, the pay is high, and there are various hidden perks she can freely explore.The only downside is that the system keeps urging her to resign, insisting that someone of her talent shouldn’t be wasted in such a “small-time” system. It even actively recommends her to join a rival system next door.Moved to tears by the system’s concern, Shen Ying firmly declares that she will work here for a lifetime, dedicating her entire life to the system.Upon hearing this, the system is so touched that it sheds tears of gratitude.

This stands at the forefront of strategy guides to Life (a shitty video game)!

The end of the world is coming, the world has undergone great changes, and everything has changed. Plants, animals, and even insects, as long as there are living things, have mutated.
Become more powerful, and even evolved supernatural abilities, such as chickens and ducks that can fly to the sky, such as cats and dogs that can breathe fire.
But only humans, without any obvious changes, seem to have fallen from the top of the food chain to the bottom of the food chain overnight.
Any creature that can open its mouth to eat can treat humans as food.
But fortunately, this world has not completely killed humans. Gradually, humans discovered that they had the ability to cultivate compatibility with other creatures.
As long as it has a high degree of compatibility with some powerful mutant creatures, it can be used for its own use to achieve the purpose of protecting itself.
Fang He is a person who is very compatible with mutant animals, but it is also because of his ability that he has changed from the strongest to the stupidest.
Fang He, who was reborn, said, “Hmph, this time…”

- Description from novelbuddy