Twin Souls Crossing: The World Tree

As the oldest World Tree in the universe begins to wither, the chains of causality binding its derivative worlds snap one after another:

A top swordsman slaughters his fellow disciples, a starship captain crashes his ship, and an apocalypse leader turns into a zombie...

Every disaster points to the same cause: the World Tree is dying because of an “emotional seal,” and the only way to save it is with two fragmented “keys.”

Shen Yan, a time observer from the Original World, has silver hair and blue eyes that conceal the ability to see through causality. But years spent in corrupted worlds have left even his heartbeat as cold as data.

Gu Zhao, an empath from the Original World, has warm golden hair and carries the scent of cedar. He can soften the world's malice through empathy, but hides a fragile soul that shatters at the thought of being abandoned.

Bound by the System of the Order Bureau as “Twin Envoys,” they travel through eight derivative worlds: ancient martial arts, interstellar, apocalypse, political intrigue, show business, cyberpunk city, Republican-era China, and the void. They have just one mission:

Repair the corrupted branches, gather the fragments of the Original World, and awaken the World Tree's emotional memories.

When all eight fragments are pieced together, and the sincere feelings of everyone they've saved surge together like a flood...

The World Tree finally trembles and spreads its branches: “So... love is the most powerful law of all.”

As the Twin Envoys embrace, the stars of trillions of worlds light up at once.

This time, they are no longer tools.

They are each other's light, the world's salvation, and a destined love that spans billions of years:

Two hearts, journeying toward each other.

(Note: The complete story is 800,000 words across eight volumes, featuring quick transmigration, mutual salvation, and no contrived everyone-loves-the-heroine setup. Each volume delivers a fiery twist, with an extra-sweet happy ending.)