Seiryaku Kekkon no Danna-sama (Kari) to Koi o Hajimemasu.

Why would Lucide Cervantes, second son of a prestigious family, send a marriage proposal to Seraphina, heiress to a modest fiefdom in the countryside? (From Manga Planet) "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.