The Demon Lord and his Hero (BL) - Chapter 29 - Timeline

Cao Xin, a young man on earth, died in a car accident, traveled to a troubled world where supplies were scarce, and obtained a “Bronze Immortal Gate”…

…

- Description from novelbuddy

Existence was divided into three realms. The Heavenly Realm. The Earthen Realm. The Infernal Realm. Below them, countless minor realms of all types existed, none able to match the might of any of the Three Fundamental realms. The Celestials led the Heavenly Realm, The Immortals led the Earthen Realm and Demons led the Infernal Realm while the Rulers controlled all the minor realms. Together, they formed The Myriad Unity and allowed peace to reign supreme. The mortals were allowed to cultivate and reach for the Heavens as a balance was installed between the Heaven and Earth, all according to the Heaven’s Will. And yet, among the billions of trillions of living beings within the Myriad Unity, one seemed unsatisfied. “They are lying to us.” This man went against all known truths and contradicted the very gods. “We are in a false world! Mere pawns used to study an outcome!” And so in search of freedom and truth, this man committed the ultimate taboo. He rebelled.

Passerby-A is increasingly dissatisfied with their small part in the drama. By chance, Luo Ran was born because of this one sentiment. Her purpose is only one – to add scenes!

If you want to add scenes, you have to be with people who have more scenes. And those who have the most, are the male lead!

In the imperial harem, she is the second-class maid-in-waiting who died early beside the female lead.

In the immortal world, she is a flower demon who was mistakenly killed by the female lead before she was transformed.

In the CEO world, she is the smart secretary of the President.

In the entertainment world, she is a singer who has nothing to do with the male lead.

Luo ran uses these identities to attack the male lead and fulfill the desires of passers-by A; to add more scenes!

TN:

Passerby-A = Anonymous person, someone unimportant with a tiny role.
Add scene = to add value to a role with more scenes.

- Description from Novelupdates

An unnamed scout, sacrificed on the battlefield of the Southern Border, is miraculously reborn in an alternate universe. Unexpectedly, he becomes a shaman of the Orc Kingdom, even more, a rare Dragon Shaman that appears once in a millennium. What's more, he is cursed with the Blood Sacrifice of the vilest magic pet!What lies behind this curse?A charming beauty of the Fox Tribe, a Mermaid Princess from the Abyss Kingdom, a mysterious Clam Girl from the East, a Swan Warrior maiden, who is the very embodiment of an angel, all these arrive at his side one by one.Mysterious Panda Warriors from the Eastern Panta Clan, powerful Elephant Warriors of the Orephin Clan, the invincible Whale Knights of the Banilou Tribe, from the deep sea, to the formidable warriors of Summer Palace will follow our protagonist on the stage of a grand war, carving their own path to glory.Witness how our protagonist confronts his new identity, challenges the formidable human magic and invincible legions with the heroic Orc war-song. Witness how our protagonist take on the identity of the Double Dragon Shaman to defeat the Dragon Knights, leading the Bimon warriors, whose brilliance is gradually fading, and penning a saga of zero mortality amidst the battle with foreign invaders!