The Reincarnated Devil Saves Another World

As an ordinary high school student, I traveled to another world to become a demon king while sleeping in class to save mankind! ? There are four demon kings in this world, namely the Angry Demon King, the Time Demon King, the Immortal Demon King, and the Divine Demon King. They are in charge of the corrupted land in the east, the Tia Plain in the south, the winter land in the north, and the glorious desert in the west. One day, the originally peaceful life was broken by the Angry Demon King, who went on a rampage in the Tia Plain. The Time Demon sent his personal knights and warriors to fight against the Angry Demon King. Not long after the brave man left, a rebellion occurred in the country. The Demon King was killed, and the brave men without the Demon King's blessing quickly surrendered. The people of the entire Tia Plain were terrified. The people of the church can only call on the brave in this situation. So I started my "brave" life, This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.