Love is beautiful, but also dangerous. It can bring the best out of you or the worst. Leviathan was a vicious demon. He killed everything in his path and was feared by everyone. That was until he met Y/n. Instantly both fell in love. Leviathan changed for the better and was finally happy. He knew Y/n was the one he'd spend eternity with. What he didn't know was that someone else had their eyes on Y/n and they weren't going to go down without a fight.