The Ultimate Support Character - Chapter 575 Support of the Hero’s Party

A boy wakes up with omnitrix as a X-GENE

After being awakened by a raging headache and faint memories of his past life, Tsubakihara Yuuji found a strange smartphone he had never seen before.Opening it, he found a single question that would change his life and many others for the better, forever.[Do you wish to join the Multiverse Group Chat?][Yes] / [No]

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

Gabriel was once destined to rise as a Paladin knight, bound to no one except the church, instead he became the subject of a forbidden ritual that shattered his body and soul. Changing him from a weapon of the church to an enemy.Exiled to the Northern Kingdom, a simple hunt in Eldenreach unravels everything. A mutilated corpse carved with holy sigils, monsters fleeing something more terrifying, and a conspiracy stretching back to his very origins.