10 nen goshi no HikiNiito o Yamete Gaishutsushitara Jitaku goto Isekai ni Ten'ishiteta - Chapter 3, Although Yuui is a NEET, It Seems that He’s A Rich Person in Japan, Part 1 Yuuji’s Imouto Sakura, Going to Check the House

Criminal Psychologist, Su Xiao Pei, who was an leftover woman in her modern life, was informed by the God Of Marriage, Yue Lao, that her destined lover was in a car accident, his soul was sent to another world. Su Xiao Pei was ordered to bring back this strange man who was connected to her by the red string of fate. Otherwise, she will live the rest of her life in loneliness, with no one to support her.
But how does that man look? No idea.
What’s his personality like? No idea.
What does he do for a living? No idea.
Can she not go? Of course not.
Su Xiaopei, who believes in all things logical has run up against a serious wall this time.
The bottom line: This is a story about a modern female psychologist who has traveled back in time and an adorable warrior as they talk about love and solve crimes.

- Description from Novelupdates

Opening his eyes, Long Tian finds himself in a scene where he's beating up a protagonist.

He's confused, until a deluge of foreign memories assaults his mind, leading him to a chilling realization: He has died... and transmigrated.

But there's a problem - he's become a villain!

At first, he's okay with this. But the more time passes, he notices something.

Why doesn't he have a system?!

This worries him. Going up against a protagonist without a system feels like a suicide mission.

But of course, he doesn't lose hope. He looks at his own identity.

The young master of an ancient family, check.

Rich and good-looking, check.

A genius with extraordinary talent, check.

Awakened the martial spirit of a dragon king, check.

With all of these, does he have any reason to complain?

“Goddamn protagonist, I will make you suffer!”

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Harem or not? I haven't actually made a decision about that. Let the storyline unfold, and we'll see in the future.

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Ordinary salaryman Qin Yu had a proud and talented younger sister who was the rising star of the police detectives. He often felt inferior to his younger sister with her achievements. Gradually, he began to accept his fate…

One day, he acquired the Godfather System, allowing him to obtain the templates of top villains one after another! Using the templates, he found suitable disciples and trained them.

As such, terrifying giant-level figures popped up continuously in the underground world!

[Wanted dead or alive. S rank terrorist: Joker. Reward: 10 billion]

[Wanted dead or alive. A rank terrorist: Fake Psychologist. Reward: 500 million]

[Wanted dead or alive. A rank terrorist: Martial Arts Maniac. Reward: 500 million]

[Wanted dead or alive. A rank terrorist: Crazy Scientist. Reward: 500 million]

Before he realized it, Qin Yu had his identity as the godfather of villains exposed by his younger sister! The entire world was shocked!

When Ye Qiao received the award for best actress, they asked her about her husband during the interview.
Q: When was the first time that you noticed him?
A: In an old rental apartment. The couple next door was doing special exercises and I happened to overhear it.
Q: When did you officially meet him?
A: I was bitten by his dog and got 6 rabies shots for it.
Q: Why him?

Maybe because she had been lonely and helpless in the past.

She had been hidden herself in the darkness. The only ray of sunlight in her life was from him

A story about Ye Qianxi’s cousin from The Most Majestic You, though the story is mostly unrelated. This story was published before The Most Majestic You and is somewhat more serious

- Description from Novelupdates