Reincarnated As The Skeleton of a Fallen Angel - Chapter 10. About the past

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

[Forced Possession Summoning]A technique to forcibly summon a person from another world and defeat a monster sealed within them. It is a forbidden large-scale magic that mankind has devised to defeat an otherwise undefeatable dragon.

Yukihisa Kogure, a black company worker, was summoned to another world with this [Forced Possession Summoning] magic on one day overnight. The dragon, Veno Yveval, was sealed within Yukihisa’s body.

『To subjugate a powerful dragon by using the life of a person from another world? They will come at us with everything they have. Won’t you cooperate with me to survive?』

「Isn’t that an offer I cannot refuse? I do not wish to die.」

Thus, the escape of Yukihisa and the dragon, Veno, began.

An otherworld fugitive drama depicted by extraordinary storyteller Aneko Yusagi, unfolds!

Lucifer, an ordinary orphan boy who was brought up by a wealthy family to be the playmate of their daughter.That's how things have been until one night, when he got attack by something unnatural, that was the night the world changed for him.p.sThis world is going to be dark, lots of killings, a lot of r18 contents, most not even involving the MC, also Mc is not going to take all the girls he comes across, he will have female friends he will make along the way, there will be Yuri contents and lots more, but Actions prevails them all.

After mistakenly pointing all the attribute points to the treasure drop rate, Xiao Shi found that every time he kills, he will drop an item.

A mosquito was slapped to death, and a pill fell out.

After killing an evil spirit, a cheat book fell out.

Hacking a martial artist to death will drop out the opponent’s cultivation experience.

…

- Description from novelbuddy