Chaewon and Minju have been together for almost 7 years and are about to get married. Everything is perfect or is it? It takes a single lie to ruin everything they've built together. 

Chaewon was born from a miracle, a hybrid between a vampire from an ancient bloodline and a werewolf from the Bloodmoon pack, and so was Minju a daughter of a Warlock with a blurry history.    They were never meant to be together just like how they were never meant to exist. Yet a certain bond pulls their hearts close but with a heavy price to pay.

Kim Minju the Hospital Director of Pyeonghwha Hospital yet a struggling family member meets Kim Chaewon a North Korean spy turned military captain. 

"What's a soulmate?" "Well, it's like a best friend but more."  

Witnessing your own annoying bestfriend fall for every person would irritate anyone. What more if you're actually in love with your own bestfriend and they do fall in love with every person but you?  This is how the pretty girl Jang Wonyoung feels for the annoying bully Ahn Yujin.

Minju loves Chaewon the first time she saw her. She confesses through a letter but gets rejected by her. When her home is destroyed by an asteroid, Minju and her father are invited to live in the same house as Chaewon. She takes this chance to win over Chaewon's heart.