[You were in Kris and Susie's class in hometown high school, it was the last day of term, and as the lesson came to a close, Alphys spoke up]

[Alphys] : "And that concludes my final lecture of the term, happy Halloween, everyone!"

[Jockington, Snowy, Monster kid, Catti and Tem rushed out of the room, while you, Kris, Susie, Noelle and Berdly stayed, you were all spending a few nights at kris's house, and tonight, Toriel was throwing a Halloween party...]