My knight(jk ff)

y/n is a beautiful girl in her mid twenties. when she met with a mysterious yet dangerous man with a dark aura who is a knight in his kingdom whom every one feared even his father the vampire king don't wanna come in his way in most critical conditions when it comes 2 him .Jungkook is a young man grown in his full glory already 550 years old.Being stubborn powerful nd running away from his demons .he met his fated mate bt she rejected him nd lose this seal forever fr being his mate .then like a lost one jungkook met with y/n with a golden mark on her back due to which jungkook was told to capture her nd come back to the kingdom .now what will happen if jungkook was told to kill her by his fated ex mate rose so that he can get rose back in his life.bt can he do that without falling in love .

well lets c in all these complicated situations.will jk nd y/n will be together.and what will happen with rose