Domo. Nise Mono Seijo desu! Nekokaburi Oji ni "Konyaku Shinaito Shotai wo Barasuyo" to Odosaretemasu

The secret of the great saint Cornelia is that she is a fake saint! Ten years ago, when the country was in ruins due to the long absence of a saint, she was sold to the temple by her father, a fallen viscount who falsely claimed that "this girl is a saint." There, she fulfilled the duties of a saint, which should have been performed by performing miracles, using her knowledge and skills in pharmacology, as well as her innate good character. Although she felt guilty about deceiving everyone, she couldn't bring herself to tell the people who loved her that "she is not a saint," and she spent her days in agony. Then one day, the second prince, Jude, came to her asking for her to heal his wounds with the power of a saint. Cornelia was prescribing medicine as usual when she was told,

"...I knew it. You're not really a saint, are you?" and then threatened,

"For me, the second prince, to ascend to the throne, I need your title as the Great Saint. ...Marry me. Otherwise...I'll expose you as a fake!"