Bio of our Main Characters

in the present, there was a group of people, doing there stuff. until a bomb exploded, killing them, but they given a second chance but in a new world. but is world war 2 again, but this is different my friends. this world war 2 was longer than original and alternated.

(Note: I'm gonna make this long chapter and 90% are girls in the alternate world. and this is anime)