One Piece: The Dragon Knight of the Grand Line - Chapter 176: Monkey D. Luffy Sets Sail

After a long time in the darkness, a lost soul is transported to another world, and there the soul is given another chance and is reborn as a boy...In a world of swords and magic, Zaos is given another chance after hearing an unknown voice asking him to protect someone. While he couldn't remember many things about his old life, he still decided to live his new as much as possible. Even though it looked like he was destined to do something, Zaos chose to follow his own path as much as possible.He tried that... but it looked like the machinations of destiny won't give him much option. Weird things were happening in the kingdom he was born, and before he could imagine... Zaos was throw in the middle of a war in which some were trying to revive the god of the world, and others were trying to prevent it. Zaos will fight in this war while he also looks for the person he is supposed to protect.The story, all names, characters, and incidents portrayed in this production are fictitious. No identification with actual persons (living or deceased), places, buildings, and products is intended or should be inferred.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Uchiha Kai has been cautious since he came to this world. He vowed that he must be cautious and go to the end.

But one day he received a mission – to cover the wave wind team to blow up the Kamabashi Bridge, Uchiha Kai knew that he was going to be unlucky…

- Description from novelbuddy