Apparition One: Hanako-san of the Bathroom

What if Hanako-kun and Yashiro switch their roles? What if Yashiro is the Seventh Wonder and Yugi Amane summons her?

This story takes place in Kamome Gakuen where it's famous for its Seven Mysteries. Yugi Amane, a first-year high school student, due to losing a Hanafuda game; summons the famous ghost of the girls' bathroom, Hanako-san of the Toilet. Upon meeting the famed apparition, Amane's life took an unexpected turn.