He and he and she are in a triangular relationship. An ordinary honeymoon trip unexpectedly attracted the most cruel and unintentional devil he had ever encountered in his life. Because of a failed mission, he was poisoned, lost his memory, and became a controlled party. His master wanted him to kill his beloved fiancée with his own hands. With no memory, he accepted the order, stepped into the trap set by the devil, and was about to kill the woman he loved most by himself without realizing it...