samuraimax

The year is Post Disaster 323. More than 300 years after a great war between Earth and Outer colonies known as the "Calamity War", Mars has been successfully terraformed and colonized by humans.

Shimazu Toyohisa, while involved at the Battle of Sekigahara, manages to mortally wound Ii Naomasa, but is critically wounded in the process. As he walks from the field wounded and bleeding, Toyohisa finds himself transported to a corridor of doors, where a bespectacled man at a desk waits for him.