The Fallen Hero Reincarnates as the Demon King's Son - Chapter 23 - 22 - The Library’s Ghost

I had a supporting role in a modern fantasy.

The loyal dog of a villain with an angel’s name, Cheon Sa-yeon, and an unfortunate supporting character who died on his behalf, Han Yi-gyeol.

In order to escape from Cheon Sa-yeon and survive, he must use the protagonist, Ha Tae-heon.

But Ha Tae-heon, who he thought of as a lifeline, was infinitely indifferent to him. Rather, Cheon Sa-yeon showed interest.

But besides that, something strange happened.

The events that occurred in the original story had advanced, and the gate and monster levels had risen. Even the people were “different” from the original.

The original version I was trying to use was wrong.

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

[WSA 2025 ENTRY]“What is this for??”Draven, a Pentagon champion, searches for a real challenge that will test his true strength. However, all his opponents bore him.Then, without warning, he's thrown into a magical world. Here, everything your power, status, and even your worth depends on the color of your Status System I.D.His given goal? Protect the Verdant and lift the curse using his skill, the Veilbreaker.Sounds easy for the likes of him?Think again.Verdants are cursed worse than commoners who have not even the slightest ability!He will bleed every time he lifts a curse!And he has to face beasts, monsters, high-breed animals, higher I.D.s and even gods![You unsealed Naisha skill: Stealth][You obtain Stealth skill.]Challenge accepted!

Twelve years ago, an old beggar found an abandoned baby and took him as his own son, naming him Xu Han. But when his foster father dies, Xu Han finds himself in a training camp with dozens of other kids, though what they’re training for remains a mystery. It’s here that he meets his best friend, Liu Sheng, and life is good for a while — regular hot meals and a safe place to stay. But kids keep being taken and not coming back, and eventually, Xu Han and Liu Sheng find themselves left in the woods at night, where they discover what’s happened to the kids who disappeared before them — they’ve been turned into zombies! Can the pair destroy the zombies and survive the night, or will they be the newest victims of this twisted conspiracy?