Itsuwari no Hanayome wa Nigerarenai

"When I think of her, I lose it." Alicia, an illegitimate child, had been living modestly with her ailing mother when, one day, she is suddenly taken away by her father, Duke Viklas. With her mother held hostage and knowing that she will be killed as a substitute for her half-sister Helena, she is sent off to Duke Karl Adrian, her political enemy, as a "fake bride." Meanwhile, Karl, who has been searching for the daughter of the Viklas family who saved him 12 years ago, finally reunites with his savior, and senses that something is not right… Original Webtoon