Le secret de mon adorable Grand-Duc

The moment Arcelia woke up and found herself in a fantasy novel, she knew she was in trouble. Owning the power of a truth seeker didn't make life easier for her, either. Forced to pay the debts of a person she trusted, she strikes a deal with Duke Kasius Arren Ambrose, the most powerful person in the empire. Only Arcelia can help him return to his dragon form by helping him find the "Piece of God", and he is the only one who can save her from the loan sharks. Arcelia knows she shouldn't mix business and pleasure, but how can she resist when the Duke is the cutest man she's ever met?! (Source: Pocket Comics) Note: First released in English, with the initial eligible release in Japanese followed by Korean, making it a manga by our standards.