Kanpeki na Shukujo no Fushidara na Keiyaku

Frieda, a countess and honor student at the prestigious Strahl Academy, is known as the "White Lily," but she harbors a shameful secret that she can't tell anyone. Eisen, the son of an upstart trader from a humble background, finds out about it. Frieda is pale with fear, but Eisen whispers to her, "Are you willing to make a deal?" He is known as the "Devil's Merchant" and he offers her a contract where they both get what they want from each other by pretending to be lovers. But Frida's heart is flustered by his sweet words that almost make her think that he had real feelings for her…

A love story between polar opposites, "The Devil's Merchant" and a an innocent, high-class lady, who are both unrequitedly in love with each other!

(Source: Fairy Kiss, translated)