There was no one left. They had lost the war. Salem had destroyed Vale, Mistral, Atlas, and Vacuo. Years later, Jaune, Ruby, and Weiss are all that remains of the Huntsmen. After losing to Salem in their third and final battle, the team escapes with their lives and decide to bet everything on Weiss's ability to send them back in time. Mystery Jaune pairing. Also, White-rose.
Jaune never wanted to be a Hunter. He wanted to be a musician. Partly due to his father, but mostly his own stupidity, Jaune winds up in Beacon, with no weapon. Making matters worse, his teachers think his instruments are badass weapons. Rather than ask, they launch him into a Grimm filled forest, no aura, no landing strategy, nothing but the guitar on his back. JaunexMystery Humor