Gold Kingdom and Water Kingdom (Japanese: 金の国 水の国, Hepburn: Kin no Kuni Mizu no Kuni; lit. 'Land of Gold, Land of Water') is a Japanese manga series written and illustrated by Nao Iwamoto. It was serialized in Shogakukan's Flowers magazine from October 2014 to April 2016, with its chapters collected into a single tankōbon volume. It tells the story of Princess Saara and Prince Naranbayar, who, in a bid to maintain peace between their rival kingdoms, enter into a pretend marriage and unexpectedly begin to fall in love. An anime film adaptation produced by Madhouse premiered in Japan in January 2023. Source: Wikipedia (en)