Where do we begin?

Y/n, a boy who got caught up in the business of killing, soon it turned from killing humans to... well this may sound crazy but killing devils and angels. His orginization was on every watchlist in the worlds, they went by a simple name, Balance. Their mission was to keep the natural order of the world moving, everything balanced, the brotherhood of assassins had killed a god before, and the killed THE god before as well. Y/n is coming of age to where he is assigned his first ever solo contract, on a boy with a powerful gift, Issei Hyodo. "This isnt the time for heros."

SOMEHOW NUMBER ONE IN LIGHTNING! THANKS GUYS!" #1 LIGHTNING!