10-nenkan Karada wo Nottorare Akujo ni Natteita Watashi ni, Nido to Kao wo Miseruna to Konyaku Haki shitekita Kishi-sama ga Kyou mo Sugattekuru

The earl's daughter Sadie has made quite a name for herself as the villainess of the century during the ten years that her body was hijacked. When she realizes she has gotten back in her original body, Rufus, the commander of the knights, is in the middle of breaking off their betrothal. Even when she tells him the truth that her body has been hijacked, he refuses to believe her. Thus, Sadie begins to look for the culprit as well as the cause of the body-switching. Meanwhile, Rufus cannot hide his confusion over Sadie's sudden change in personality... The story unfolds as the two slowly get closer to each other, overcoming a slew of misunderstandings along the way. (Source: Kodansha)