Girl returns to her body after it being possessed for the past 10 years. She comes to find that the woman who inhabited her body treated everyone (including her fiance) horribly and no one, except her maid/parents, believe she switched bodies.
So far, it's an interesting take on the isekai-possession trope that I haven't seen before.
10-nenkan Karada wo Nottorare Akujo ni natte Ita Watashi ni, Nidoto Kao wo Miseru na to Konyaku Haki shite Kita Kishi-sama ga Kyou mo Sugatte kuru