MTL - Honkai Q&A, Starting with Kiana - Chapter 11

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

Hell's Awakening: The Guardian's RiseIn the fiery depths of Hell, where infernals, demons, and ancient creatures reign, the balance is fragile. At the heart of this underworld stands Azrael, the Guardian of Hell, a powerful being tasked with keeping the infernal realms from chaos and preventing the resurrection of fallen demons. With mastery over fire magic and the strength to command Hell itself, Azrael's existence is defined by vigilance and control.But when a powerful force of rogue infernals escapes their prison, led by a ruthless and vengeful faction, Hell’s foundation begins to crack. As these infernals break free, their goal is clear—to unleash an uprising and bring back the dead. Azrael must face not only these deadly foes but also confront his own inner demons. As the situation escalates, Azrael discovers his own potential for evolution—powers he never knew he possessed that could either save Hell or destroy it entirely.Amid this turmoil, the arrival of deities, including gods of light and purity, threatens to further destabilize Hell’s delicate ecosystem. They believe Hell must be purified, even if it means eradicating the guardian himself. As battles rage, alliances shift, and Azrael’s strength grows, he must decide whether he will uphold the order or reshape Hell in his own image.In this battle of gods, demons, and guardians, Azrael’s evolution is just beginning. The question is not just whether Hell will survive—but if Azrael will become its ultimate ruler—or its ultimate downfall.

Roy died in an unfortunate accident.

He thought that was the end.

But unfortunately for him, God didn't have a place for him in heaven, and the devil didn't want him in hell either.

So he ended up in the body of a famous count's third child, who his entire family neglected.

The world was exactly the same as the one in the novel he had read the day before he died.

The person whose body he had come to possess had the same name as him but wasn't mentioned in the novel because he had died two years before the forces of chaos invaded the county.

That meant, while Roy was alive in this new body, two years later, he would die, ripped apart & eaten by a monster.

He needed strength to survive the future events, but unlike the protagonist of Stallion novels, he didn't have a golden finger!

[You've gained 1 EXP]

It was only after unintentionally stepping on a bee Roy realized that he possessed a golden finger!

And this golden finger might be his key to becoming the strongest!

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.