Risou no Himo Seikatsu  

The Ideal Sponger Life, 理想のヒモ生活

Yamai Zenjirou is an ordinary office worker living in contemporary Japan. One morning, he receives an unexpected summons to a distant land where dinosaurs roam freely. He learns that this place is known as Capua and the person who summoned him is Queen Aura, its ruler. She wants Yamai Zenjirou to marry her and become her prince consort. The reasons for her proposal are manifold, but ultimately, she needs an heir, and she believes Yamai Zenjirou is the ideal candidate. If Yamai Zenjirou accepts this offer, he will never have to work again, as he will live a life of luxury with nothing more pressing than securing his successor as king. Of course, sleeping with Queen Aura's beautiful form is no hardship, but is everything truly what it seems? Before making a decision, Yamai Zenjirou must consider giving up everything he knows and loves on Earth at a moment's notice for her sake. Additionally, if he decides to go through with the proposal, he will need to adapt quickly to the politics, people, and culture of this new world.