MTL - Battle Emperor - Chapter 2352 Go to war

Four years after the Third Nightmare, something unexpected happens. A group of people find themselves in a strange theatre, which tells them to react to someone's story...?

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 a realm of four kingdoms, two were on the verge of war. Prince Eirik, the fourth prince of Valeidio, a Ferre whose beauty could rival the gods, was thrust into a marriage alliance with Prince Kaelix, the strong and proud heir of Zephyros.Both princes were determined to fight against the fate that had been forced on them. Eirik resented being used as a pawn, while Kaelix saw the alliance as a threat to his freedom. As they clashed in a battle of wills, their encounters became a constant push and pull of resistance and pride.But as the pressures of duty mounted, the lines between obligation and desire began to blur. In their struggle against their forced union, they found themselves drawn toward each other in ways they never expected.Would their bond become a weapon against the war or would their kingdoms' rivalries destroy any chance of love before it could take root?

Su Mo is a late bloomer, introverted and not very good at communicating with strangers.

I thought that my life would be so dull, but after participating in a national game “Star Ring”. Rediscovered the joy of life and embarked on the road to the top of the throne.

- Description from novelbuddy