[Many years ago, your great-great-grandmother on your father's side made a deal with a demon named Hyunjin that the first girl in their family would be married to him when she was 18. That first girl turned out to be you.]

You celebrated your 18th birthday alone. When you got home from school, you bought yourself a little cake and a candle and sat in your room and made a wish.

"Happy birthday to me..."

You blew out the candle and suddenly the lights went out in the house