Toaru Majutsu no Index: New Testament - Volume 3, Chapter 4: Isolation and the Collapse of the Rules. Trident.

[Fiction from the 1980s] Su Wen read a popular novel about son-in-law in the 1980s. The hero is a tough guy with a sense of security, but at the same time he is a bit dark-bellied and sullen.

It was the style she liked, so with a wave of her hand, she rewarded one million reading coins—and then she became the hero’s scumbag ex-wife.

In the book, the original body, as the head of the family who recruits a family at home, does not want to stand up for the family, but is a love brain. Don’t want to have huge golden thighs, but was instigated by the little white flower heroine, and fell in love with the scumbag from the next village.

After Su Wen came through, she hugged the male lead’s golden thigh tightly, and worked hard to make money and become rich. As a result, the younger sisters were too competitive, crying and shouting to recruit a son-in-law at home like the older sister, and they gave birth to a baby with the surname Su.

So, Su Wen started the rhythm of choosing her son-in-law every day, all of them are handsome and talented. One body is better than the other, and the family background is better than the other. It’s so hard to choose!

Someone who was left out aggressively blocked her behind the door: “Am I handsome? Is my figure good? Is my family strong?”

Su Wen: “…But they are my sister-in-law.”

“My whole body is yours. I will give you the passbook, and I will give you my life.”

The next day, Su Wen woke up and looked at more than twenty passbooks, lost in thought…

This is a reincarnation/isekai story, about Matt (later TreeTree), an overpowered tree in a fantasy world that serves as the battlefield for an ongoing conflict between demons and the heroes summoned to oppose them.At first a bystander, over a long period of time, TreeTree will learn all sorts of skills, gain levels, and in doing so, build up a forest, train young subordinates, protect a village, and more.

Jiang Pengji got something called the Court Intrigue Stream System.
System: “Your goal is to become the most prestigious woman in the kingdom (the Queen)!”
Jiang Pengji: “Okay, System. No problem!”
Years later, she met the target by becoming the most prestigious woman (the Empress).
Jiang Pengji: “Well done, no?”

There are a total of seven sins, and a revelation is made to a young man named Alex that he is destined to become a demon lord, more especially a demon lord of sin called LUST.

It's not like he can change that and because he always knew something about himself was different—not in a physical sense, well, maybe a little—and not in a mental sense—but rather because he is thrown into a demonic war that compels him to accept his new reality.

He was only aware of a difference in himself. Relating to him and the ladies who are drawn to him... Well, it was more or less like he was a magnet in front of all the girls, and all the girls were drawn to him like a metal.