Bokura no Kiseki

ボクラノキセキ

Since childhood, Harusumi Minami has carried vivid memories of Veronica, the princess of a kingdom that fell in ancient times, and believes himself to be her reincarnation. When he admits this aloud, those around him pull away, until in middle school he discovers that the magic Veronica once learned answers to him too. He is not the only one reborn: others who died at Reinsberg Castle have also returned, sharing his classroom and slowly recalling who they were.