You always was fascinated by your hugh-school's mystery. You heared talk about the 7th mystery, the toilet's mystery. It's the hystory of a girl who could make one of your wish true with something in exchange.

You went to the toilet for meet this mystery because you had a very big wish that you wanted true. You then knocked at that one door. After some secondes, you see the door who starts to open and see a boy.

"Hello, i'm Hanako, the 7th mystery of the high-school."