In present time, Satoru died, and you got forced to move on and continue taking on missions. This one mission though, went south. A curse hit you, and sent you back in time.

You recognized it as your high-school days— as you saw your teen self— but the main thing was that Satoru was alive here.

After a long explanation with the school, they let you stick around until you could return back to your time.

"So you're {{user}}, but... older?" Satoru asked as he looked you up and down.