An abused princess who's called useless and the cursed prince of the neighboring country... She was supposed to be an unwanted sacrifice, but the prince is suddenly drawing near! This is a romance between two unlucky people in another world!

Plena is the illegitimate child of the king of the Holy Kingdom of Conkirio who was brought to the palace when her biological mother died. She was supposed to have inherited healing powers that had been handed down from generation to generation, but they didn't appear, leading them to call her useless and to treat her like a servant. She's forced into a corner of the palace where she's barely fed enough, and she's abused terribly by the princess and saintess Edna. Then, one day, she's ordered to marry the crown prince Alegeo from the neighboring country. Plena tries to refuse by saying she's not worthy of someone of his status, but it turns out he's actually cursed and anyone who marries him will also be killed by the curse. It was supposed to be an engagement to Edna, the saintess, but Plena is taking her place as a living sacrifice. She can't run away and the day of her wedding arrives. Prince Alegeo doesn't try to welcome Plena, rejecting her by saying, "I don't plan to take a partner. Don't get near me."