Master of Kaidan - Chapter 14 - Phantom Objects

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

Jin, a guy with no direction in life, through an unfortunate event gets his hands on a Hitman System. What transpired then was a struggle to escape the eyes of the cops while trying to complete the system’s missions. However, through a series of coincidences, he soon finds out that his parents’ death was not an accident. Read how he uncovers the veil that has obscured the truth from his eyes since childhood and finds out the darkness that hides under this veil. ‍

What people do, heaven sees. Evil-doers will receive punishment. But there is always someone who thought that because they have the protagonist halo, they could do whatever and bully whomever all they want without any consequences. Then, let’s just remove their halo and tear down their mask of hypocrisy. Let those scum men and goody two-shoes experience “putting yourself in other’s shoes”, so they would know they were at fault.

At first, Lu Jingqian thought he had to sacrifice his body in order to complete the task. But there are three benefits in doing so; having great items, living a good life, and having a high face value. After a long while, he also felt quite good… what to do?

System, “Can you be more modest? Please remember when you first rejected the idea, what about those just and upright words you said before?”

Lu Jingqian looked at the sky, “Modest? What’s that? Can it be eaten?”

- Description from Novelupdates

“There are no heroes in war, only monsters.”This was an outlook that Sato Katsuro, a man in service to the military, formed after being broken down by years of gore-filled battle.It was an outlook that he took even to his grave...but what about beyond it?Reincarnated into a new world of fantasy and tasked to be the very thing he'd given up on becoming, Sato would have to fight a new war. A war between mankind and an oppressive enemy regime run by a cohort of demons.But, as Sato learned in his past, war wasn't always what it seemed. In war, truths were lies, friends lurked as enemies, and the so-called heroes...they were often the villains.