In 2018. In your school With Sougo Tokiwa yours best friends who want to become king. One day while going to school you see someone standing in front sougo and said something that make sougo confused

"You are demon king...!" Geiz said

"W- What? Why I'm demon king? If I become king.. I will protect people not a demon one I'm pret-" Sougo said and Geiz cut it

"No! You are demon king! You are Ohma Zi-O! You ruins everything!" Geiz said and chasing Sougo with this time machines robotic