The Forgotten Character

Fifty years ago, towers called the Tower of God descend upon this earth. At first humanity have passive reaction toward this. But within a certain order the towers suddenly begin spewing out monsters, however that is not the only thing humanity have to care about. As with the appearance of the towers, dimensional rifts created by the Devils appear all over the world. humanity with a little to no resistance lost. but as there's darkness there will be light, one after another, humans with Special Ability appear and fought back against the monsters and the Devils, they reclaim Human's land. those humans are then dubbed as Heroes. But the humans don't know, those last fifty years is just the beginning. " why the hell did I create this kind of setting" a young man grumbled inside his dorm, inside the number one Heroes school located on a moving artificial island.