Mi Kawari Reijo Ha, Haitoku No Biyaku De Hatsukoi No Kimi Wo Netoru (Moon Drops Book) [Light Novel]

[Machine Translation] Victoria was raised carefully for 10 years as the only daughter of a viscount. However, soon after her birth, it was discovered that she had been replaced by a nanny's daughter, her name was changed, and she was sent to an orphanage. Two years later, she is adopted by a countess for her high education and enrolls at the Royal Academy as a substitute for the real countess. There, she is heartbroken to see her first love, Sejour, grow close to Victoria, now a viscountess.

子爵家の一人娘として、10年間大切に育てられたヴィクトリア。しかし、生後間もなく乳母の娘と取り替えられたことが発覚。名前を変えられ孤児院に送られる。2年後、教養の高さを買われ伯爵家の養女となった彼女は、本物の伯爵令嬢の身代わりとして王立学院に入学する。彼女はそこで、自分の初恋の人セジュールが現在の子爵家のヴィクトリアと親しくなっていく様子を見て心を痛める。