MTL - The Roots of Manga - v3 Chapter 294 give it to me

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

In the year 2075, yet another fully immersive VR game New Origin took the world by storm with its unparalleled freedom and virtually limitless play world. This classic yet extraordinary game quickly became a ’second world’ for people, and within just three years, the virtual and real worlds became deeply intertwined. People played New Origin to earn a living, to find freedom, and to escape their hectic everyday lives. Elio started playing for similar reasons. Driven by the eternal flame of an artist, Elio embarked on a journey to experience the true freedom this new endless world had to offer—along with a certain special person. Believing in every creature’s right to freedom, Elio challenged the concepts established in this new world with his companions. Unknowingly, this decision set him on a journey to become the strongest existence in this mysterious otherworld.

Aomori, who has a monster-fighting system, came to the world of One-Punch Man and gained the ability to enter various instances.

Therefore, “Founder of the Hero Association”, “NO. “And other titles fell on him one after another.

Comprehensive flow, the main world One Punch Man.

Completed dungeons so far: Pokémon – Demon Slayer – Sword – Pokémon – Digimon – Spell Return – Yokai Comprehensive World (Girls that Noragami Inuyasha can see, etc.) – Pokémon – One Piece-re0-Dragon Ball wait.

- Description from novelbuddy

“Martial Arts World...” Death murmured, shocked by the turn of the events. How could he, primordial being of the afterlife, get tricked by a mere human? Not just a mere human, but also earthling, race that was weakest of the twenty realms. Death realized the extent of his mistake. An earthling had just jumped into the river of the reincarnation, where he definitely didn’t belong. It was too late. The damage has been done. The matter was now out of his hands. “Kiernan Hunter...” ... Remake of the Martial Arts System, and while the concept stays the same, the story is completely different. A few names, etc, stays the same, but mostly whole new story.