Moto Tensei Reijou to Suuki na Jinsei wo

Synopsis

Karen is a reincarnated lady who has overcome many cruel challenges. One day before her wedding to the new emperor, Reinard, she is lured by a strange girl to a place that is not like the one that she knew. It is a "what-if" parallel world where Karen had not been reincarnated at all. In order to return to the original world to find her loved ones, Karen's new adventure begins! (Source: Hayakawa Shoten, translated)