Olivia and the Neverending Dream

Olivia was betrayed by her fiancé, Luke, and publicly executed. But when she wakes up, she finds herself in a different world, as a high school girl named Hanabi Kaburagi! It seems that Hanabi has been bullied by everyone, and when she goes to school, she is targeted by her class. What's more, a classmate, Oshino, who looks exactly like Luke, appears there...? (Source: Shueisha, translated)