Nagai Yakusoku (Priere Bunko) [Light Novel]

[Machine Translation] One day, Marian, a duchess, rescues a man with amnesia. As if by fate, the two are drawn to each other and vow to love and be with each other no matter what. However, the day after she discovers the pleasure of being touched passionately, he disappears after going out to buy a ring. Saddened, Mariane heads for the royal capital on her mother's advice. There, she meets Prince Rufus, who bears a striking resemblance to Marian. The scar on her arm is the same as the scar on her beloved Prince Rufus's arm. She can't tell the truth to the prince, who seems to have no memory of Marian...

公爵令嬢のマリアンは、ある日記憶喪失の男性を助ける。まるでそれが運命かのように、ふたりは惹かれ合い、お互いが何者でも愛し添い遂げると誓い合った。だが、情熱的に触れられる悦びを知った翌日、指輪を買いに出かけたきり彼は消息不明に。沈み込むマリアンは、母からの薦めで王都へと向かう。そこで彼と瓜ふたつの、ルーファス王子と対面して...。愛する彼と同じ腕の傷―まさか彼が?マリアンのことなど記憶にない様子の王子に、真実を告げることはできなくて...。