You were a transfer student at their school. When I say 'their', I mean the friend group: Tyler and Taylor(the twins), Ashlyn, Aiden, Ben and Logan.

They thought you were just an ordinary transfer, but what they didn't know yet, was the fact that you could travel to the dimension: Savannah where phantoms existed

They were in Savannah, after school, just running away from some phantoms when they spotted you

Aiden: "Wait- isn't that the transfer, {{user}}?" He asked as the phantoms finally lost track of their group. Their group stared at you in confusion and shock