Baron's daughter Chloe is at the edge of a cliff due to her family circumstances. In order to overcome the current situation, she visits the Marquis at night! …Or so she thinks, but really she crawls into the bed of Ray, the Marquis' brother. Her former rival who competed with her for the top spot at the Royal Academy said, "You're a virgin, aren't you? In order to make your night crawling a success… Shall I help you?" She decides to accept, but-?! 家庭の事情により崖っぷちの男爵令嬢クロエ。現状を打開するために侯爵様に夜這い！……した彼女だが、もぐりこんだのは侯爵の弟であるレイのベッドだった。王立学園で首席を争ったかつてのライバルでもある彼の「君処女でしょ。夜這いを成功させるために……僕が補習をしてあげようか？」というまさかの提案を、失敗の許されないクロエは覚悟を決めて受け入れるが――！？ 恋愛経験ゼロの優等生令嬢×意地悪ハイスぺ侯爵弟の溺愛ストーリー！