Dungeon Overlord: Monster Girl Harem! - Chapter 107: Execution... Dungeon Union.

This is a story about a young man who sought to fight against his destiny. With the help from billions of Dragon Energies trapped on the Rising Dragon Pillar in his body, he emerged from the dark and quenched himself with the blood of ancient dragons. He fought the heaven with the Buddhist Art for the people he loved and built the Eternity Kingdom with his own hands. This is a story about the rise of the Martial Emperor who will rule both earth and heaven.

- Description from Novelupdates

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 silent solace of a forest on an unknown island, a middle-aged man awoke to a world brimming with vibrant life. A stark difference between the preceding sceneries of the concrete jungle that shrouded his life.As his mind emerged from the murky depths of unconsciousness, he was greeted by the gentle sunlight filtering through the lush canopy above.His name was Abraham Shepherd, an office worker.When he salvaged a tinge of his lucidness and calm, Abraham found himself grappling with the fog of memory and the weight of his recent demise. However, he found comfortin the tranquility of his surroundings.Though initially disoriented by his newfound state, he gradually reclaimed his composure and clarity of mind.But Abraham's respite was short-lived, for he soon realized the extraordinary circumstances of his existence.Transmigration.Transmigrated from his former life as an ordinary office worker, he now stood at the threshold of an unfamiliar realm, teeming with possibilities and unknown dangers.Recalling the horrific experience of his untimely demise during a heated gaming session, the helplessness, fear, and loneliness. A flicker of determination soon ignited within his soul.Driven by a newfound resolve to seize control of his destiny, Abraham embarked on a journey of self-discovery and survival. With each step forward, he embraced the uncertainty of his new reality, determined to carve out a place for himself in this fantastical world.But as fate would have it, Abraham's path would intersect with a revelation beyond his wildest imagination yet should have been expected to come.| Initializing Naval Building System… |―――――Do you want to read a story about a protagonist summoning modern warships into a fantasy world? Well, here it is! The Naval Gacha System: It's Time To Monopolize The Seven Seas!

As he transmigrates across the continent of Douqi, Gu He takes on the mantle of Alchemy King Gu He and gains an incredible power - the Ten Thousandfold disciple cashback system. This allows him to grant gifts to his disciples, which are then returned ten thousandfold.“You have gifted Liu Ling the Green Lotus Core Flame, triggering a tenfold return and granting you the mighty Green Lotus Holy Fire!” the system announces as each gift brings Gu He greater power.After three years of intense training, Xiao Yan returns proudly to the Yunlan Sect, eager to display his newfound strength.“Don't underestimate this once poor youth!” he warns his former lover Nalan Yanran. “Today I'll show you what a true genius can do!”But Nalan Yanran just smiles faintly. “Is that so?” she asks, as a terrifying Dou Emperor aura suddenly surges from her.Shocked, Xiao Yan stammers in disbelief, “How did you become a Dou Emperor powerhouse?”With an arrogant smile, Nalan Yanran replies, “With my master, anything is possible.”