Zenjirou Yamai is an ordinary office worker in modern Japan until one morning he is suddenly summoned to a tropical world where dinosaurs roam. The one who called him is Queen Aura, ruler of the kingdom of Capua, and she wants him to marry her and become her prince consort. She has several reasons for the offer, but chief among them is that she needs an heir and wants him to father it. If he agrees, he will never have to work again and can live in comfortable luxury, with securing the next monarch as his only real duty. The price is leaving behind everything he knows on Earth, and the arrangement may not be as simple as it looks. Accepting would also mean finding his way through the politics, people and culture of an unfamiliar land. The story is a fantasy romance with a dramatic side, adapted from a light novel series.