Mangas

一夜だけのプリンセス, Ichiya dake no Purinsesu, Princess of Convenience
In order to buy the highest quality yarn, fashion designer Jessica travels to the Principality of Alp'Azuri in Europe. While admiring the picture-perfect beautiful landscapes on a drive through the country, an out-of-control car smashes into Jessica's car at full speed and knocks her out! When she regains consciousness, she finds herself at the royal palace. Alp'Azuri's Prince Raoul's fiancee died in that crash. Jessica blames herself for her death, but Raoul firmly asserts that it is not her fault...
雇われたプリンセス -  A Royal Proposition
Penny-Rose, a stone mason in the Principality of Castaliae is summoned by the Queen. She asks Penny-Rose to marry the prince... but only for one year. To succeed the throne, the prince needs to marry a woman of "unimpeachable virtue." Startled by such a sudden request, Penny-Rose hesitantly accepts. Despite knowing he is to marry another after her, she is slowly drawn to the prince, and eventually falls in love...