"Ever since that night, I've lived only to kill you." Kohaku was the lone survivor from her hometown, which was sunk and destroyed by the kingdom's guardian water dragon. She entered the Imperial Place under the guise of a lady-in-waiting, plotting to take revenge on Prince Miaki, who was supposed to be the only person who could control the dragon. However, he seemed nothing like she imagined. And when he caught her, he unexpectedly asked her, "Why don't you pretend to be my consort instead?" This begins their thrilling contract marriage, to uncover the plot involving the succession to the throne! 偽りの妃×次期龍皇、皇位継承絡む契約結婚!!大陸の五分の一の領土を誇る、天阿国。その都から遠く離れた故郷を国の守り神である水龍に沈められ一人生き残った琥珀は、女官として皇宮に出仕する。すべては、水龍が唯一従う次期龍皇・水晶に復讐するため。「あの夜から お前を殺すためだけに生きてきた」しかし、水晶に詰め寄ると予想外に「偽りの妃にならないか」と持ちかけられ…!?