Seiryaku Kekkon No Danna-Sama To Koi Wo Hajimemasu.
Summary
I can't (crying) I'm still engaged." The fiancée starts with the body of a prestigious noble family!? Living together before marriage ♪ Suddenly, Lucid, who was a famous knight and son of the noble Cervantes family, came to Seraphina, the daughter of a rural noble family. A marriage proposal is coming. Seraphina bravely calls out to him, who has been cold and closed for some reason. But she suddenly got pushed down in Lucid's room...