Challenga's Manga

transmigrated into a novel as the villainess shortly after she attempted to poison the "heroine" that everyone likes. However, she quickly and quietly cancels the engagement and leaves for the North. After some issues with heating, she calls forth a demon to start a fire and keep warm. Birth of a comical couple

The novel was really good, not sure how this manga will turn out, so I currently have it on hold until it hit about the half way mark. About the wedding would be good.