Drifters S01

Shimazu Tadahisa is who, gets involved in the Sekigahara war and receives a mortal wound from Naomasa and as he, defeated in the war and with heavy bleeding, walks through the field full of corpses, he sees himself in front of a door and a hallway and a man who is waiting for him behind a desk, his name is Murasaki, the one who sends Tadahisa through that door to another world. When Tadahisa wakes up, he sees great warriors who, like him, were transferred and are in a group called the Drifters. But what is the task of this group? What fate awaits Tadahisa and the others?