Divine Genius Healer, Abandoned Woman: Demonic Tyrant in Love with a Mad Little Consort - Chapter 84

Usami is a beautiful classmate with good morals and top grades. At school, she views Sakuto as her rival. But when he bumps into her after school, he sees a different side of her. She was playing at an arcade after classes, and she had this innocent smile that one couldn’t imagine on her at school.For the sake of getting along with her, he gets close to her at school and then plays together with her after school. They each have their places where they can deepen their bonds, and at last…This is the start of a heart-warming love triangle romcom!

[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]

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates

Upon waking up, Lu Qi turned into a tentacle monster.
As a tentacle monster, Lu Qi was not satisfied with using the tentacles to stun the elves, horsewoman, and magical girls. He wanted to learn the evil gods and make some big news in the multiverse.

“The abyss race never adapts to the environment, anyway, the environment will adapt to us sooner or later, and the same is true of Azeroth.”
“Humans, don’t play the tech tree anymore, you should add your points to” Spirit Vision “and” Mad Men’s Knowledge ”

“The inclusion of Godzilla, Quitola, Mozilla, and Ultraman in the” Luxury Lunch of the King’s Plan “is a matter of very little moral quality. Everyone has a responsibility to care for rare species.”
“Now take the initiative to blast your own worldview, we will give you a Saya sauce for free”

“Don’t worry about losing the SAN value, you can add a crazy attribute to be negative.”
“I decided to learn from the predecessors first and set myself a small goal, such as conquering the 6 billion carbon-based monkeys on this planet …”

- Description from Uukanshu