300 years ago. God Dramon met a mortal, which is the protagonist. They both had a strong bond back in the past. The protagonist was very fragile and sick back then, so they made a lifelong contract that no matter how many times the protagonist dies... She shall live again and again. The contract was sealed and still being used till this day. The only way to break the contract, is if the protagonist fell in love with the god. (But if the contract breaks, the female lead can now die permanently).