Mistaking My Sister-In-Law for My Wife After Getting Drunk! - Chapter 4 - : From Ex-Boyfriend to Sister’s Husband

This is an alternate history. Decades after the fall of the Eastern Jin Dynasty, the world is still in chaos, although there is hope for reunification.

A recurring nightmare afflicted Khan's nights since the Second Impact. His dreams replayed the scenes of the crash of the Nak's spaceship, an alien race that the humans had defeated five hundred years ago.

The scum’s or villain’s long road of transformation was tentatively set to the world:
The abandonment of the educated youth’s wife (Completed)
The hidden marriage of the scum film emperor (Completed)
The best brother in the world (Completed)
The Phoenix male who destroy the bridge after crossing the river (Completed)
The treasonous general (Completed)
I’m an honest man (Completed)
To become the top scorer in the School of Agriculture (Completed)
The soft rice man’s self-cultivation (Completed)
The whole world is reborn (Completed)
I want to survive on a desert island (Completed)
The stallion male who has seized the opportunity (Completed)
The perverted self-salvation (Completed)
The spring of the loafer (Completed)
The misplaced life (Completed)
The miser career (Completed)
The ghost is out of feeling (Completed)
The Queen’s favorite husband (Completed)
The vicious girl with her godfather (Completed)
I want to be a good person (Completed)
I does not tear up the family (Completed)
The perverted common plant (Completed)
The Mary Sue’s men (Completed)
Every time I was reborn, someone wants to kill me (Completed)
The old people’s counterattack path (Completed)
The global evolution (Completed)
When I became a net red (Completed)
For you, good person (Completed)
His heart had white moonlight (Completed)

- Description from Novelupdates

“I only want you, Theia. Always have always will and this shall never change. How could I ever want another when I possess the one I solely exist for?”“Phobos,” I call his name fondly a need to hug him and breathe in his calming scent surfaces.“I do not wish to treat you like you are made of glass because you aren't. Your body was made for me and it can handle everything I choose to give it. And this I will prove it to you.”“When?” I ask breathlessly as he ultimately turns around to meet my curious eyes. Golden rings outline his irises his beast announcing his presence and they stand as one before me. A wicked smile paints his face with a flash of canine displayed to me. A promise he gives that I will be ruthlessly devoured.“When I fuck you senseless.”~~~After years of excruciating loneliness, Phobos approached me. A frightening beast, my soulmate who emerged from within the bounds of a ruthless thundering storm. The male I yearned for. He caught me off guard and I was under the spell he cast through his ocean eyes. A spell I couldn't defeat and that very moment I knew I was in trouble. The second our eyes met I knew he would bring me endless heartache.We were childhood friends, him and I. Phobos the gentle and playful juvenile I grew up with and looked up to as a pup vanished and was replaced by a cold-hearted barbarian, he terrified me as he killed many with a blink of his eyes. No regret, no concern his beast often in control surging forward consuming his senses. They were equals.How can I connect with a beast like him? How could I make him call me his? How can I love my childhood friend who has become a merciless monster?