Koigokoro ni Kurushimu Ouhi wa, Ikoku no Kusushi Outaishi ni Kyuuai Sareru

Luzeria, a duchess, married King Edward, but their union was not genuine. The king, having grown fond of Airi, a baron's daughter, caused Luzeria to lose hope. She took a love-erasing medicine provided by Akil, a renowned foreign pharmacist, and ended the marriage. Returning to her family's estate, she began receiving visits from Akil. As their relationship developed, he disclosed that he was the crown prince of a powerful nation, searching for something—and that something was Luzeria. He then unexpectedly proposed to her.