Humans and merfolk are on terrible terms. After jumping into the sea, I was accidentally captured by a merfolk and taken underwater as a hostage. Somehow, I made the merfolk king fall in love with me and became his queen, only to be dragged back to reality at the happiest moment of my life. The heroine is the creator of this world, endlessly restarting its timelines just to catch a fleeting glimpse of him... She is highly intelligent and incredibly strong. A tragic romance. An intensely tragic romance.