Kyoukai Senjou no Horizon - Volume 8B, Chapter 38: Discussers at the Meeting Place

10 years searching for his lost sibling.

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

In a world where magic is long but a thing of the distant past, where humans have the potential of harnessing a dormant power within them, called Battle Force…

A man from modern day Earth finds himself suddenly waking up in the body of Norton Lorist, a youth of noble descent that had been exiled from his homeland in the North by his family to Morante City, the capital of the Forde Trade Union on the pretext of pursuing his studies.

Little did he know what would await him when he receives summons from his family years later to return to the Northlands and inherit the position of the family head…

This is the tale of his life before the summons…

This is the tale of his journey northward and the allies he gathers along the way…

This is the tale of his rebuilding his family’s dominion and keeping it safe from other power hungry nobles…

This is the “Tales of the Reincarnated Lord”.

When the eldest prince Luo Fei reached 18 years old, the database automatically screened the genes of omegas across the entire empire for matching. The only son of a wealthy businessman, Mo Lin, had a gene match of more than 90% with the eldest prince. However, the moment he saw Mo Lin, Luo Fei learned that this omega is a sick child with paralyzed legs, hemiplegia, and severe mental illness???