"Kuji" kara Hajimaru Konyaku Seikatsu - Gensei naru Chuusen no Kekka, Warawanai Jiki Koushaku-sama no Konyakusha ni Tousen shimashita

"I'm just a daughter of the "mafia" and I'm the fiancée of the next duke? ......!" Belle, the only daughter of a poor noble family, arrives at a ball organized by the Duke of Rouvent. She was only there for the delicious meal, but as soon as she arrives at the manor house, she is told that she is to