Black Gate: Ember Xi

The world is full of black gates, corrupting beasts are rampant, and the gatekeepers are all prisoners of fate. He is the most useless mortal, he is the only salvation and also the death. Destiny is no exception. To save this world, you have to kill the only light in your heart with your own hands. This is the fate that a young man cannot escape, and it is also the cruelest ending.