searching for a manga

Hi, i saw an ad for a manga on social media and didnt save it... Now i m looking for it but cant find anything with the keywords i remember, so hoping that maybe anyone here might know? It seemed like a shojo manga (?) about a girl getting married (due to her father asking for it) to a knight/marshal. But the groom never came and she just stayed married with him for 8 years before asking for divorce since they never met anyways. Does anyone maybe know the title?