Watashi to Konyaku Haki Shite Kawairashii Imouto wo Tsuma ni Mukaeyou to Shita Ouji no Matsuro (Associated Names)

The Duke’s daughter, Leila, has been destined to marry the fifth prince, Oswald, ever since she was a child. The only person who can truly support him is herself, his fiancé. That’s why Leila didn’t indulge Oswald any more than necessary, and sometimes gave him a hard time. Because that was her way of loving…