How could a marriage proposal from her first love become a source of suffering?

It's been a while since Arabella saw her first love, Darius, the Duke of Carlyne. He has blond hair and beautiful eyes and is a friend of Arabella's brother. Arabella and Darius used to be close, but on the night of the ball, he was cold and distant. She was wondering why Darius had such a sad look in his eyes when he suddenly kissed her! This nineteenth-century tale is the fourth and last volume about four siblings from the distinguished St. Claire family! Enjoy this high-society love story illustrated by Chieko Hara.