Bokura no Kiseki

Minami Harusumi has had recurring dreams of a princess named Veronica, whose kingdom is on the brink of destruction, since a young age. He believes these dreams to be recollections of a past life, and that he is her reincarnation. Ridiculed by his classmates, he is eventually driven to the point of bullying, whereupon he discovers he possesses magical abilities, reminiscent of Veronica's studies. Emboldened by this discovery, Minami seeks to uncover the truth about his past memories and the circumstances surrounding them.