I Swear My Pool Don't Have A Python - Chapter 17: The Bear Goes Berserk!

Luo Wencheng made a deal with a certain existence and went back in time to ten years ago, when he had just been released from prison, still young and healthy, not yet pushed to the breaking point by Luo Wenjun and not yet used by him as a prop to test drugs for profit until his tragic death.

This time he was going to trample Luo Wenjun underfoot.

The first priority was to steal Luo Wenjun’s future backer from him.

- Description from Novelupdates

** A Light Novel featuring a weak protagonist tasked with the impossible mission of saving a Virtual Reality world that has moved on without him. This post-apocalyptic sci-fi is brimming with drama, conspiracies, and action. **As the Santa María spaceship travels the galaxy in search of a new home for humanity, all passengers must remain in cryosleep and log into The Novus, a Virtual Reality MMORPG designed to train the younger generation in building a civilized society.Not only is this place a utopia, but it’s also a fresh start for seventeen-year-olds Alan and Astrid, who have just started dating.“Life in The Novus will be awesome with you by my side!”But an emergency pulls Alan out of the system—a catastrophe that endangers the lives of the Santa María's population and their mission.What will he find when he returns?Three years have passed. Astrid has become one of the strongest warriors, and Alan... is now the weakest User in the virtual world.

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

This is a story of a modern man returning to ancient times, returning to a real world without any extraordinaryness, and slowly rising by relying on the ability to attribute all data.

- Description from novelbuddy