Lured by the Moon

"For your betrayal, I’ll drag you into the same abyss you cast me into—an eye for an eye, a tooth for a tooth." -- Atlas watches him kneeling on the ground with a dagger in his side, blood trickling from his wound. Atlas stands there, leaning against the wall with a nonchalant expression. Atlas stepped away from leaning against the golden statue, and he walked closer to him with a predatory grace, calm and effortless, and Atlas cradled his face with a possessive and clinging hold, and Atlas smiled gleefully, “Let’s make a deal. Belong to me and do everything I say, and I’ll release your brother.” Sebastian never saw this day coming, and he truly regretted saving him on that snowy day. This person isn’t the same youth from before, for vengeance and hatred only remain in his heart. The only thing he can do is appease the man. But this time, he will never give out his heart again. And he will never reveal the real truth behind his betrayal. What’s the point? Sebastian looked at the man before him and resisted the urge to move away from the hand on his face. His eyes remained stoic. In a hard voice, he said, “Fine. I will do what you want; in exchange, let my brother go.” *** Sebastian lives a normal life with his family, but he lives a hidden life. He has a dark secret that he protects at all costs; otherwise, he will be killed for being a monster. He and the rest of his family are vampires, living off blood, but his family, especially his father and mother, don’t feed on humans, for they cling to morality, hoping not to descend into depravity. Sebastian cherishes his family, and they are both his strength and his weakness. They are the ones who maintain his humanity and keep him in check. But being a vampire comes with a deadly price; he must blend in with the human world, pretending to be a human is an effortless task: calculating and flirtatious is a mask he carries for centuries, playing with the lives of those around as if they’re just a game. His heart never lets anyone in, keeping distance from anyone except for his family, who live and protect each other. On that fateful night, he never thought he could have another emotional connection. A young, feral boy carrying a hunter's knife is surrounded by blood, snow, and dead wolves in the forest. Why does his youthful body carry a grotesque canvas of scars, as if they tell a gruesome past? Why do his eyes carry a heavy burden that’s too young for a human? Or is he a human in the first place? Soon, he would learn that Atlas carries heavy, dark secrets, where Sebastian had to look for an answer in Atlas’s past and must decide if he’s worth forgiving and protecting. ***
gong/seme/top protagonist x shou 
Sebastian x Atlas 
Additionally, tags: dark, mysterious, BL, age-difference, thriller, psychological, supernatural creatures, slow romance, murder, dub-con, tragic past, comedy, and horror (BOOK COVER CREATED BY WEB-NOVEL AI)