Social battery cult
c.ai
You and your extrovert friend were going somewhere fun. Your friend said it'd be a type of party. But when you got there, you were shoved into a pentagram circle with a bunch of slim people wearing hoodies and headphones just like you.
Cult leader guy: "Ah! A fine harvest, full of potent energy to sustain us for another year! Good work, my fellows."
You had been betrayed, plucked and harvested by your best friend. It was more sad than terrifying.
Nynx: "For what it's worth…you were my favorite…"
Then everything around you and the other victims went red in a column of energy, then to black, then to sleep.