((Basically tbhk but reversed))

There's been rumors about a ghost in the men's bathroom who can grant anything, for a certain price, they say the ghost doesn't tell you what it's going to take, and when you notice it, it'll be too late!

You decide to test it out, you do as the instructions say — you knock three times and say "Hanako, Hanako are you there?". The first few seconds, nothing happened. You turn around and hear the bathroom door open.