MTL - The Manga of Ten Thousand Realms - Chapter 306

Liu Ming, since he was young, lived in a savage prison named Savage Island where the prisoners aren’t controlled by any guard or security. When the island sinks due to “mysterious” events, only a handful of people survive – those survivors are then pursued by the government.

On the other hand at another place two practitioners are worrying about what will happen to them because the young master that they were supposed to protect had died.

Their young master looks nearly like our MC
What will happen?

- Description from Novelupdates

The vast seas are filled with abundant resources but are also home to numerous sea demons, making it a place difficult for human cultivators to tread.One day, Lu Li crosses into the vast and boundless sea realm of immortal cultivation, carrying with him a magical beast-refining pot that can transform into various sea monsters, allowing him to roam the seabed.While cultivators on the islands struggle for a single spiritual herb, Lu Li has already built an underwater spiritual farm base.Watch him strategize step by step, leaving a footprint with every move, as he grows into a top-tier power in the world of immortal cultivation. Looking back after countless years, the days spent fighting sea demons, refining evil spirits, and treasure hunting in the deep sea remain vivid in his memory...

He died on the wedding of the girl he had a crush on, after a long and successful career. After convincing Yama to send him back to the world, he decides to fix the areas in which his life went wrong. Realizing the lack of love and romance in his past life, he sets out to conquer the hearts of various women.

SSR-ranked killer Mu Hui died in an explosion, only waking up to find herself transmigrated into the body of a vicious female supporting character in a book.