Demonic Revenge Contract

Alister was often bullied, and the home that was supposed to be a solace was riddled with trouble. Every day, he cursed his own weakness. In a particularly bad day, he cursed his own fate. Why was he born weak? The Gods gave no answer, and a demon's soul that inhabited his body answered instead. "You are weak, and you would just accept it without a fight? Might as well die now, you maggot!" The demon who called himself Zeri, offered an unrivaled power and a wish, in exchange, Alister would have to kill the twelve families who killed Zeri in his previous life. Or was that really the full truth? It is a story of tempering resolves, and a cosmic war that brews under the pristine facade of humanity as we know it.