"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...
「ダメです（泣）まだ婚約中なのにっ」
婚約者は名門大貴族 カラダから始まる!?婚前同棲♪

田舎貴族の娘セラフィナの元に突然、大貴族セルバンテス家の子息で高名な騎士だったルシードとの縁談がやってくる。
ある理由から冷たく心を閉ざしていた彼に甲斐甲斐しく声をかけるセラフィナ。
だけど突然、ルシードの部屋で押し倒されて…