Majo no Konin Nise Hanayome to Reikoku Kishi no Hatsukoi

Neri is a witch who resides in the Blue Forest, burdened by the memory of her mother being taken away as an "evil witch" when she was young. One day, a young woman arrives seeking refuge from an arranged marriage. Hesitant at first, Neri becomes unsettled as she hears the woman's story. The intended groom is Erwin, the man who once took her mother. To uncover the truth about her mother’s fate, Neri uses her only magical ability to transform into a young woman and agrees to marry Erwin as a fake bride. Their marriage between the cold-hearted Erwin and the disguised witch is set to begin, but complications arise.