End of Century

A modern high school sophomore went beyond his limits when he witnessed his best friend being killed, but he was still unable to save himself and fainted in the park. When I woke up again, it was a hundred years later. Everything was different. Magic reigned here! Guided by the mysterious man's last words, he unexpectedly discovered dimensional information, and in order to save his demon parents, he practiced all the way and accidentally embarked on the road to salvation.