The 8 Wonders | Toilet Bound Hanako-kun x reader

Have you heard the rumor? eight of the eight school mysteries: Mio-san of the hidden melody. They say that if you go to school at 7:59pm you will hear a special melody hidden somewhere in the school if find out where it's coming from in exactly one minute at 8:00pm Mio-san will grant you whatever wish you want without...