The cherry blossom impact

In a desperate attempt to stop Madara during the war, Sakura is trusted with the task of sealing away his chakra only for their plan to fail thanks to the intervention of Zetsu. Unaware of it, Tobirama had marked her with his Hiraishin to ensure her safety only for it to backfire a year later by dragging Sakura into the past. FoundersxSakuraxIzuna