My Girlfriend is a Parasitic Alien!. My Girlfriend is a Parasitic Alien!, #1

At thirty-two, Yan Shen is the ruthless, iron-fisted CEO of the trillion-dollar Yan Corporation, a man who rules Jinghai City's corporate empire from an obsidian desk. Guarded, cold, and haunted by the mysterious death of his parents two decades ago, he trusts no one. But corporate greed runs deep, and a brutal betrayal by a trusted family ally ends with a lethal neurotoxin in Shen's veins and his body discarded at the bottom of an isolated quarry valley.
He was supposed to die in the dark. Instead, a cosmic catalyst intervenes. A dying, ethereal entity of pure photonic energy and structured shadow from the planet Umbris crashes into the exact same abyss. Desperate for a biological anchor to survive Earth's atmosphere, the entity fuses with Shen's molecular structure at the exact moment his heart fails-consuming the poison, restarting his pulse, and binding their life forces irrevocably.
When Shen wakes, he is alive, but his shadow now harbors a sentient, fiercely protective force. To navigate human society and remain close to her biological anchor, the entity assumes a flawless physical shell, takes the name Su Ying, and enters Yan Corporation as his enigmatic executive assistant. What follows is a dangerous game of corporate warfare and supernatural survival. As Shen and the brilliant, deeply literal Su Ying launch a high-stakes sting operation to destroy the forces that betrayed his family, their symbiotic bond deepens into something undeniably human.
But their victory draws the eyes of far more terrifying predators: a specialized black-market paramilitary unit armed with alien-countermeasures, and a ruthless cosmic hunter tracking Su Ying from the stars. Faced with an enemy that can tear them apart, Shen and Su Ying must decide how much they are willing to sacrifice. When the ultimate choice demands a devastating neurological reset, can love survive if the mind forgets?