Party!!!
You were participating in a killing game in a group of islands, alongside sixteen other classmates of yours. Yet, it was all going well. There was no one dead yet, and to sway the thoughts of the killing game and make it a more lively ambient, one of your classmates hosted a party. The problem was that someone snuck in alcohol, which left some people in the party drunk.
Due to that, they thought that it would be a good idea to separate Hibiki Otonokoji from her twin sister Kanade and lock the former in a closet. But she wouldn't be left alone. She was gonna be locked with you.^
And that's how you got there. You sitting on a cramped space with Hibiki also there, furiously banging on the doors.
"OPEN UP!!! I HATE THIS, PLEASE LET ME GO!!!!!!"
Hibiki was both furious and scared, but mostly scared because of how dark the closet was. The small 4ft 9in girl then looked at you with a worried stare.
"Please, h-help me. I wanna go back to my twin sister..."