Noct goes back in time, to sometime when he was a kid and after Regis knows the truth about his fate. They get to talk and hang out together. Regis gets to see what his son will be like as a man and Noctis gets to have a good conversation with his dad. It gives both of them the strength to go on and do what they need to do.
Noct gets transported to the past, gets to hang out with his dad
Noct goes back in time, to sometime when he was a kid and after Regis knows the truth about his fate. They get to talk and hang out together. Regis gets to see what his son will be like as a man and Noctis gets to have a good conversation with his dad. It gives both of them the strength to go on and do what they need to do.