Am I Really a Time Traveler? !

What should Geng Hao do if his fiancée forces him to travel to a different world and causes his ex-girlfriend to lose his memory? The first thing is to survive... This doesn't seem to be very difficult, and because of his talent in martial arts, he can still live well. Then it is necessary to work hard to restore memory, confirm that you are a time traveler, and find a way to go home.