After Jaune is supposedly killed by Cinder Fall during the Battle of Haven, he is transported to a world similar to Remnant, but very noticeably different. In order to return home to rejoin the war, Jaune makes a deal with the US government: join the crew of US Outpost 31 in Antarctica, and in return, the government will try and create a portal back to Remnant. Unfortunately, things don't go as planned when they find perhaps one of the most horrific creatures Jaune has ever encountered.
Jaune Arc dies in the distant future after his final battle against Salem and his soul is sent to his past self five years before cannon and merge with that past self. Now armed with future memories He aims to make a difference and become the Golden beacon of Hope.
* Definitely no harem*