He thought he was going to return to his original world as an ordinary working adult, but instead he found himself back in the world as a 17-year-old high school student. He was going to enjoy the 90's with ease, but when he learned of the existence of t

One day, an ordinary high school student is transferred to another world.He raises his level in the other world, successfully defeats the Demon King, and saves the world!With his strongest status, he decided to return to his own world.However, in the worl