Take a bunch of random people from history and make it a battle manga. Basically famous people from history are coming back and fighting each other for reasons. Nothing really matters except they now have super powers based on their most famous achievements.
What's even better is that everyone isn't just some japanese hero you've never heard of. In lieu of twenty different Nobunagas and we get real history figures like Lee Harvey Oswald, Charles Darwin, Bobby Fischer, Julius Caesar and everyone in between with pretty awesome anime powers pitted against each other.
The main protagonist is kind of a drag, but plenty of time is spent without him and gives plenty of times to people who matter, like Isaac Newton, Einstein, and loli Hitler.
As a history buff and a fan of battle manga it pumps me up with every reveal. Definitely a fun ride for me.