War on Geminar: The one who cannot not lose

Zaraki was taken in by the Masaki Family. Prior events has made him into the person who he is today. Which is a person who hates to lose. Sent to a different world with his little brother, Kenshi, was now tasked with saving the world and has to find a way to return home. Will they be able to return home or maybe staying here wont be that bad?