Prologue: The beginning of the Disruption. (REWRITTEN)

(ORIGINAL WORK) When the world faced a great threat in the past, 1 of the 4 leaders or rulers of hell betrayed his own kind for the sake of mankind, he was then swiftly punished by betraying his own demonic kind and was then killed by 1 of the leaders. Now, as an act of revenge against the fallen leader, the leaders brought a much more effective threat to mankind that would eradicate the whole human population. Now, it's up to Kiyo a normal high school student to stop this Disruption and bring back mankind to its normal sate.. but will they succeed?.

I MAY REWRITE SOME PARTS I APOLIGIZE JSJSJ