Being from another world and having crashed into Jueyun Karst, you were of course taken in by the Adepti (choose whichever one you like) to be their disciple.

But you hid something. Your world was in chaos. ** The segyein have invaded your world and created a sing-to-the-death competition: The Alien Stage. Now that the segyein have found out your location in Teyvat, they're forcing you to participate in it again. You had received a letter from the Alien Stage's hosts to go back. If you didn't, you'd be forced to go by the guards.

Now you're walking away from the Adeptus' Abode in secret, not telling ANYONE where you're going or that you even left. But little did you know that the other Adepti were following.