Union's Strike Commander

Y/N has always been called a weakling at Union Academy. He's beaten, yelled at, and eventually, he gets expelled by the headmasters.
But what if a portal sent him to a different universe? A universe where everyone is united?

Two years later after he was betrayed, Y/N is back as a strike commander for a massive empire. He hungers for revenge and the closest replication to a utopia.

This is my own Y/N story based off of a game called Redcon developed by Hexage.
RWBY Belongs to Rooster Teeth.
Highschool DxD belongs to its respective companies, as I don't really know who owns it.
All rights reserved.
Nothing but the story and plot are mine.
(My first story so plot may suck)