Saereul Ijeun Manyeoege

Prince Alec, the troublemaker of the Royal Family, runs into some trouble himself when he discovers he is being hunted by assassins. With magic involved in this deadly scheme, the only one who can protect him is Victoria, the Witch of Bitter Cold, who offers her help in exchange for a “small” favor. But as her title implies, Victoria is devoid of human emotions and will stop at nothing to get what she wants. Although Prince Alec tries to maintain some distance between them, this proves to be difficult the longer he is stuck with his icy protector...

(Source: Tappytoon)