So What If It's an RPG World - Volume 5 - Chapter 30: Black Chesspiece

She was a medical expert, talented and beautiful. She was reborn as his little wife. Her in-laws did not like her, her husband did not love her, and she was as timid as a mouse. She was weak and easy to bully.

He holds a god-level sign-in system in his hand, punches the goose factory, and steps on the pig factory. Do you think there is no good game?
First feed you two mouthfuls of tainted milk powder, and then send you the legend of the dragon and the Hearthstone gold cartoon for free.
What? Still not satisfied? League of Kings out-of-print skin, give away!
Satisfied? Tch, this is just the beginning…

- Description from novelbuddy

Genius Female Forensic Scientist VS Tough Criminal Police Captain[Mystery + Detective + Sweet Romance + High-IQ Crime + Serial Killings + Psychological Profiling + Suitable for the Faint-hearted]Schizophrenia, antisocial personality disorder, high-IQ crimes… This is a world where psychopaths run rampant.The Cat Fetus Case, the Lovers’ Butcher, the Angel of Death… Evil delusions always invade reality, accompanied by violence.Their First Meeting:Mu Mian asked very sincerely, “Hello, would you be willing to donate your body to me after you die?”Later:Fang Rui: “If I fell into the water along with a victim’s corpse, which one would you save first?”Mu Mian: “You!”Fang Rui looked at her with some surprise.Mu Mian: “Because the corpse will float by itself~”

A normal person, Xin Yun, received a second chance by transmigrating to an unknown world. But because he chose to indulge in women, he lost his chance to become the most powerful.

When he gets caught by the force a struggle between the nine most powerful experts, something unbelievable happened, or it could be said that a miracle occurred. Xin Yun was reborn and sent back to the place he had transmigrated over to.

Having been reborn, Xin Yun decided he wanted to become the strongest being together with the three top experts from his previous life: the most beautiful dragon- Sparkling Butterfly, Yi Luo Xiang, the cruel dragon- Evil Empress, Yan Qing Ying, and the most dazzling dragon- Peac*ck King, Ming Xuan!

Furthermore, he wanted to pursue love with the most beloved person from his previous life- Yi Luo Xiang! Xin Yun, making use of his good fortune, used his memories from his previous life to prioritized becoming friends with Yi Luo Xiang, Yan Qing Ying and Ming Xuan. He even received a godly artifact from his previous life- the Heaven Splitting Axe!

- Description from Novelupdates