MTL - Stone Age Husband Raising Journal - ~ 33|Misunderstanding

Cosplayer Liu Mang accidentally crosses through time and arrived at the Eastern Han Dynasty wearing Aries Gold Cloth. (Saint Seiya!) He arrived on top of the walls of XiaPi right when it was about to fall to Cao Cao.

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.

Humanity was on the brink of destruction. Muyoung, an assassin from the Forest of Death, fell to his knees. There were corpses all around him. For years, he had worked for the Forest of Death and had finally been able to eradicate them. Now, he, himself, was about to die. He closed his eyes as he felt his heart stop beating.