The Imprisoned Princess Dreams Twice

What she lost were her future and someone precious to her. Her broken engagement, the false accusations, and the final moments of Ed, the loyal knight who devoted everything to protecting her… In exchange for his life, Princess Annabelle turns back time to the past. “This time, I will defy fate, no matter what.” She attends the academy in search of the key to unlocking her magic, and soon her relationship with Ed begins to differ from the one in her previous life…

https://www.cmoa.jp/title/349683/