Goblin Kingdom - Volume 1, Chapter 20: Gray Wolf II

Damon’s lips twisted into something between a smirk and a sneer. “Sisters or not, I kept them alive so you could watch me rip off their heads one by one. That’s the only reason they’re still breathing.”My jaw tightened. “You wouldn’t.”He leaned closer, his voice lower. “Wouldn’t I?”“You kept them alive?” I repeated his words slowly, my voice cracking with disbelief. “Just so I can watch you kill them?”Damon stood tall, his eyes twirled with something sinister, his expression was like a carved stone. “Yes,” he said flatly. “You cared enough to protect them. Now you’ll watch as I end them.”My chest tightened. The air grew too thick to breathe. “You’re cruel.”“I’m Alpha,” he replied, his tone cold, without a shred of mercy. “Mercy gets people killed.”‘Psychotic bastard. I wish I could drive a knife into your chest right now!’~~~~~~~~~~~~~~~~~~~~~~~~~~When Ember opened her eyes, she was no longer the powerful, independent woman she once was.Instead, she woke up in the fragile, abused body of a lowly Omega—destined to be nothing but a breeder for the Alphas.Her escape attempt didn’t get her far. Instead, it led her straight into the path of Damon Blackthorn—the ruthless Lycan King feared by all.Sold like a slave by her own father, Ember becomes the property of a man with a frozen heart and a violent temper. But beneath her submissive mask lies something more: a cunning mind and a will that refuses to break.Now, in a world ruled by dominance, power, and ancient bloodlines, Ember must do more than just survive.She must outsmart a king.She must earn the loyalty of the very people who scorn her.And maybe—just maybe—she’ll bring the Alpha to his knees.

It was started with a harmless request, “Jessica, clear out a room for Zoey, she'll be moving in with us for the time being.”Jessica's marriage soon ended when that 'guest' climbed up the ladder, from a guest room downstairs, to Jessica's bedroom, and then, her husband's bed.After losing in the fight for her husband's attention and love, Jessica realized it was time to wear back her garment of dignity and respect. She signed the divorce papers and left the country.Two years later, she returned as the heiress to a conglomerate, but her husband was at the airport, waiting to welcome her home.“When did I say I didn't love you, Jessica?” he asked.

Gu Jin crossed into a novel as the supporting character and best friend of the main female lead, Cheng Xin.

Cheng Xin was frequently surrounded by men of status and quality. As Gu Jin was the female lead’s dearest friend, she doesn’t mind settling for the leftover meager soup if the female lead chose to eat the meat. The two sisters believed they’d enjoy this friendship for a lifetime.

But just as she was ready to latch firmly unto Cheng Xin’s golden thigh, she discovered the body she crossed into had memories of future events beyond the novel’s plot, finding out that her marriage would end in utter failure.

The female lead, Cheng Xin who often quarrelled with the male protagonist would head over to Shao Chong for comfort even though Shao Chong was married to Gu Jin. And after several incidences, Gu Jin advised Shao Chong to have a sense of propriety as her spouse but he told her not to think too much about it, claiming that he only maintained a pure friendship with Cheng Xin.

On the day Gu Jin was kidnapped, her good husband stayed by her cousin’s side and accompanied her to the hospital.

When Gu Jin transmigrated into this new world and learned of the truth, she did not wish to waste this new life as a supporting role for her cousin as the previous soul had done. She’d not live a life as a spectator in someone else’s love story. No. She would be the protagonist of her own romance in this new life.

- Description from Novelupdates

This is a story of a man named Kim Sae-Jin, who one day, inexplicably wakes up as a Monster. Follow him and his perilous journey to get his life back as a Human, all the while growing even more versatile as a Monster in the process. This should be… complicated, somewhat.