Office worker Yamai Zenjirou is pulled from Japan into the tropical kingdom of Capua, a land where dinosaurs still roam, and Queen Aura offers him a life of luxury in exchange for marrying her and giving her an heir. Torn between the life he left behind and the one on offer, Zenjirou weighs the proposal against what being a queen's consort actually means: an unfamiliar court, customs he has to learn from scratch, and politics he never asked for.