One Piece: Seaside System - Chapter 3: Marine Based -

The genius cultivator Lin Xuanzhi didn’t let down the world in his past life, yet he only betrayed a single Yan Tianhen.

It was only when he had been backstabbed and killed by his closest friends, teacher and fellow disciples that he knew what kind of unforgivable crimes he had committed.

After he gained the huge opportunity for rebirth, the Lin Xuanzhi who had climbed back up from hell swore to cherish the person that he had betrayed in his past life.

- Description from novelupdates

Lou Yao Yao wasted her life fighting over a man, only to find out he wasn’t worth it in the end. Because of this man, she accidentally killed her rival in love, and even ruined the man who had always been watching over her.

Getting reborn as her 20 year old self, there is still time to fix everything. Lou Yao Yao decided to live as a genuine vicious woman. After getting her hands on the loyal like-a-dog man, she would show that cheating couple what pure loving affection looked like.

- Description from Novelupdates

Jiang Ping transmigrated to a world of the cultivation and became the chief of a deteriorating cultivation family. Most importantly, he had three cute and playful daughters.

Because the world of cultivation out there is too dangerous and his daughters are too young, Jiang ping chose to hide their identities and live in a small town of ordinary people. He kept warning his daughters that the world out there is too dangerous, so don’t make any trouble.

“Daughters, you must remember that there are tons of bad people out there! Their favorite thing to do is to kidnap little girls like you and use you for evil cultivation methods.”

“In this world of cultivation, the most important moral to follow is to stay low-key and hide. As long as we don’t cause any trouble, we’ll never be in any danger.

Until one day, when a supreme divine cultivator came to seek revenge, Jiang Ping smacked him down on the ground and completely crushed him over and over again…

His daughters asked, “Daddy, was that person you just beat up a Divine Cultivator?”

Jiang Ping said, “Nop, that was just a bad person who was trying to disturb our happy life. Daughters, the world outside is too scary, we didn’t even go out and danger came knocking on our door!”

His daughters asked, “Daddy, do you think that we’re all idiots?” The servants he hired all said, “So the family chief is the real supreme cultivator?”

Back to the end of Ming Dynasty, he was reduced to a slave.

This emperor, a beggar can do it, a slave can do it, a bandit can do it, but a house slave can’t do it?

- Description from novelbuddy