Lisary falls in love with Marquis Orion's only son, Hugo, while working as a servant in the Orion manor. Many protest the idea of a nobleman marrying a servant, but through the power of their love, Lisary and Hugo convince the marquis to allow their marriage on the condition that she go away to finishing school to learn how to be a proper aristocratic bride. Though both their hearts ache to be separated, she departs for the school... Six months later, she returns from her studies and rushes straight to Hugo's side. However, her excitement at finally seeing him again is cut short when he looks at her and blearily asks, "Who... are you...?" Thus begins a fantasy romance about this former count's daughter, raised as a commoner, and her second chance at love with the amnesiac nobleman her heart desires!
オライオン侯爵家で使用人として働くリサリーは、その家の一人息子・ヒューゴと恋に落ちる。
身分違いの恋で周りからの反対の声が多かったが、二人の気持ちは強く、
リサリーが良家の子女が通う寄宿学校で花嫁修業をすることを条件に、婚約が認められた。
二人はしばしの別れを惜しみながら、彼女は旅立った――。

半年後、寄宿学校から戻ったリサリーは真っ先にヒューゴのもとへ。
久しぶりに会えると浮足立っていたが、再会したヒューゴの様子がおかしい…。
彼はリサリーに「君は……誰だ…？」と尋ねてきて――!?
記憶喪失の侯爵×庶民育ちの元伯爵家令嬢、二度目の恋を巡るラブファンタジー、開幕！