It's Been 13 Years Since Our Engagement, but I Still Haven't Been Loved ~The Princess Who Wants to Be Loved and the Future Duke Who Desperately Tries Not to Love HerNew婚約13年目ですが、いまだに愛されていません～愛されたい王女と愛さないように必死な次期公爵
It has been 13 years since the innocent princess Frederica was engaged to the future duke, Strauss, at the age of five. Their relationship remains as close as siblings. Frederica longs to change their relationship into that of a loving man and woman. She begins to try every means possible to win his love. Seeing her determination, Strauss finally breaks down his walls, and his doting love becomes unstoppable