The Demon king's silent vow

"That night’s accident was supposed to be the end of Sheyaan’s life..." ​The wreckage of broken cars, the smoke filling the air, and that cold scent of blood—Sheyaan was counting her final breaths. Then, piercing through the darkness, he emerged. His eyes were cold, and within them was a faint red glow, as if he didn't belong to this world at all. ​Zavian. ​He saw Sheyaan writhing in pain near death, but he did not help. Without saying a single word, he vanished into the darkness, leaving her alone before death at the mercy of fate. ​But destiny had something else in store. Sheyaan survived. However, after that night, some strange memories began to haunt her—memories that didn't belong to this lifetime of hers. ​When Sheyaan tries to start her life over, the same mysterious man stands before her again. This time... as a silent guardian. ​Because Zavian is no ordinary human. He is the King of the Demon Empire—a being at whom even the devils themselves tremble with fear. But for an unknown reason, his life is now bound to Sheyaan. If Sheyaan dies... Zavian’s existence will also end along with her. ​As enemies begin hunting Sheyaan’s life, Zavian is forced to stay by her side like her shadow. But Sheyaan is not as innocent as she appears. Inside her sleeps the soul of a 'Queen,' whose rage once burned an entire empire to ashes. ​And that very rage... that very light... was the real reason for Zavian’s birth. ​Is Zavian protecting her only to save his own life? Or is there a bond between them that neither heaven can break, nor hell? Male Lead: Zavian Female Lead: Sheyaan Supporting Lead: Fangxi Villains: Lucy, Manglong, Xavier