Frozen Wolf, Fire Dragon

Also known as: Yeojuingongi Nareul Saeeonniro Jeomjjigeotda, 여주인공이 나를 새언니로 점찍었다, The Heroine Has Her Eyes on Me as Her Brother's Wife, The Female Lead Turn Me Into Her New Sister, The Heroine Wants Me as Her Sister-in-Law, 女主角認我當嫂嫂, นางเอกนิยายปักตำแหน่งพี่สะใภ้ให้ฉัน, De feu et de glace, ヒロインが私を兄嫁にしたがっています

by Yeongyeon, Gyeoulhae, Yu-Hwa Chae

Eve was once a human woman who loved to read romance novels. But after being reincarnated as an ice magic-wielding wolf hybreed in one of her favorite stories, Eve runs into a dragon hybreed named Rahel who will kill her in the future and fall in love with her little brother, Sion. Now, Eve thinks her only hope of survival is to save enough money to move to the human world. But as Rahel grows more attached to her, Eve has no idea if she'll cool Rahel's fiery nature or burn in a blazing inferno! (Source: Tapas)