元公爵令嬢フェリシアは前を向く ～婚約者がお姉様に恋してしまったので、500年後の世界で幸せになります～

あらすじ

Felicia, a Duke’s daughter who was betrayed by her fiancé, resolves to find her own happiness. She shuts herself in her room for five days to prepare documents to persuade her parents, but when she finally steps outside, she finds herself in a world 500 years in the future!? Felicia’s second life begins!