The Tyrant King She Married in Place of the Duke’s Daughter Turned Out to Be Her First Love~Migawari de Totsuida Reikoku Kokuou wa Hatsukoi Aite deshita; 身代わりで嫁いだ冷酷国王は初恋相手でした; The Cruel King I'm Marrying as a Substitute Bride is My First Love?!; The Tyrant King She Married in Place of the Duke’s Daughter Turned out to Be Her First Love

Kanae Yano, a 28-year-old single woman with no boyfriend, is suddenly summoned to another world. There, she encounters Rita Scryne, the dukes daughter who looks exactly like her, and Ritas father, Zack. They ask her to take Ritas place in an arranged marriage with the ruthless and feared King Eugene Astarothknown as the Merciless Wolf. Upon learning that the summoning magic can bring people from another world but cannot send them back, Kanae finds herself with no choice but to accept. However, when she meets King Eugene, she makes a shocking discoveryhis true identity is none other than her first love! Thus begins a fantasy romance where fate reunites two lovers in an unexpected world.