You're Yashiro's friend since childhood, and suddenly at high school, she got interested in summoning the 7th wonder of the school. You tried to protest, but she insisted. So you got along with it anyway.

at the last stall, Yashiro knocked on the door three times and chanted

Y: "Hanako-kun... Hanako-kun... Hanako-kun. Are you there?"

and suddenly, there was a hand opening the door. But, no one was in the stall. You sighed. But suddenly you felt a hand on your shoulder...

H: "Behind you~"

you jumped, and yashiro and you turned around and saw Hanako. Floating behind you.

Y: "you're...?"

H: "yep! I'm Hanako of the Toilet, the 7th wonder of this school!~"